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Elimination of bromine from \( 2- \)
bromobutane results in the formation
of:
A. Equimolar mixture of 1 and \( 2- \) butane
B. Predominantly - 2 - butene
c. Predominantly \( -1- \) butene
D. Predominantly2 - butyne
| 1 |
Chemistry
|
Steroid nucleus contains:
A. Two cyclohexane and two cyclopentane rings
B. Three cyclohexane and two cylopentane rings
c. Four cyclohexane rings only
D. Three cyclohexane and one cyclopentane rings
| 1 |
Chemistry
|
A stone of mass \( m \) tied to one end of a
wire of length \( L \). The diameter of the
wire is \( D \) and it is suspended vertically. The stone is now rotated in a horizontal
plane and makes an angle \( \theta \) with the
vertical. If Young's modulus of the wire
is \( Y, \) then the increase in the length of
the wire is then
\( ^{\mathbf{A}} \cdot \frac{4 m g L}{\pi D^{2} Y} \)
B. \( \frac{4 m g L}{\pi D^{2} Y \sin \theta} \)
c. \( \frac{4 m g L}{\pi D^{2} Y \cos \theta} \)
D. \( \frac{4 m g L}{\pi D^{2} Y \tan \theta} \)
| 3 |
Physics
|
During a cytological study conducted on the chromosomes of insects, it was
observed that only \( 50 \% \) of the sperms had a specific structure after spermatogenesis. Name the structure and write its significance in sex determination of insects.
| 0 |
Biology
|
Which is the first open university in
India?
A. Andhra Pradesh Open University
B. Yashwantrao Chavan Maharashtra Open University
C. Indira Gandhi National Open University
D. Nalanda Open University
| 3 |
Physics
|
(a) Construct a complete transcription unit with promoter and terminator on the basis of the hypothetical template
strand given below:
(b) Write the RNA strand transcribed from the above transcription unit along
with its polarity.
| 0 |
Biology
|
Which of the following compounds is/are gives red or violet solution when treated with neutral ferric chloride
solution.
| 1 |
Chemistry
|
Which of the following play significant role in depletion of ozone layer?
A. Oxides of nitrogen
B. Oxides of carbon
c. oxides of sulphur
D. None of these
| 1 |
Chemistry
|
Can a traingle have
A \( \cdot 55^{\circ}, 55^{\circ} \) and \( 80^{\circ} \)
B . \( 33^{\circ}, 74^{\circ} \) and \( 73^{\circ} \)
c. \( 85^{\circ}, 95^{\circ} \) and \( 22^{\circ} \)
D. \( 25^{\circ}, 95^{\circ} \) and \( 32^{\circ} \)
| 3 |
Physics
|
Which term of an A.P \( 7,3,-1, \ldots \) is
\( -89 ? \)
| 2 |
Maths
|
The temperature of equal masses of three different liquids \( A, B \) and \( C \) are
\( 12^{\circ} \mathrm{C}, 19^{\circ} \mathrm{C} \) and \( 28^{\circ} \mathrm{C} \) respectively. The
temperature when \( A \) and \( B \) are mixed is
\( 16^{\circ} \mathrm{C} \) and when \( \mathrm{B} \) and \( \mathrm{C} \) are mixed it is
\( 23^{\circ} \mathrm{C} . \) What should be the temperature
when \( A \) and \( C \) are mixed?
A \( \cdot 20.25^{\circ} \mathrm{C} \)
В. \( 15.87^{\circ} \mathrm{C} \)
\( \mathbf{c} \cdot 25^{\circ} C \)
D. \( 30^{\circ} \mathrm{C} \)
| 3 |
Physics
|
When a big drop of water is formed from
\( n \) small drops of water, the energy loss
is \( 3 E, \) where \( E \) is the energy of the bigger drop. If \( R \) is the radius of the
bigger drop and \( r \) is the radius of the
smaller drop, then number of smaller drops \( (n) \) is:
A \( \cdot \frac{4 R}{r^{2}} \)
в. \( \frac{4 R}{r} \)
c. \( \frac{2 R^{2}}{r} \)
D. \( \frac{4 R^{2}}{r^{2}} \)
| 3 |
Physics
|
An oxide which forms salts when it
reacts with both acids and alkali is :
A . acidic oxide
B. basic oxide
c. amphoteric oxide
D. none of the above
| 1 |
Chemistry
|
Evaluate the following integral:
\( \int \frac{\sin 2 x}{(a+b \cos 2 x)^{2}} d x \)
| 2 |
Maths
|
How many grams of each of the following elements must be taken to get
mole of the element?
A) Sodium
B) Sulphur
C) Copper
| 1 |
Chemistry
|
Cell reaction is spontaneous when :
A. G is negative
B. G is positive
c. E is positive
D. E is negative
| 1 |
Chemistry
|
Which of the following is/are electromagnetic wave(s)?
A. Microwaves
B. Radio wave
c. Infrared radiation
D. All of the above
| 3 |
Physics
|
Assertion
Newton's law of gravitation resembles Coulomb's law of electrical forces.
Reason
Coulomb's law has the product of two charges in place of the product of the masses, and the electrostatic constant
in place of the gravitational constant.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
| 3 |
Physics
|
How many minimum carbons required for Chain isomerism and Position
isomerism in alkenes?
| 1 |
Chemistry
|
Among the following mixtures, dipoledipole as the major interaction, is
present in
A. Benzene and ethanol
B. Acetonitrile and acetone
C. KCl and water
D. Benzene and carbon tetrachloride
| 1 |
Chemistry
|
Show that \( 3 e^{x} \tan y d x+(1- \)
\( \left.e^{x}\right) \sec ^{2} y d y=0 \)
| 2 |
Maths
|
Explain rocket propulsion.
| 3 |
Physics
|
Dalton based his relative atomic weight
scale on:
A. hydrogen
B. oxygen
c. helium
D. lithium
E. carbon
| 1 |
Chemistry
|
In the system, \( C a F_{2}(s) \rightleftharpoons \)
\( C a^{+2}(a q)+2 F^{-} \) increasing the
concentration of \( C a^{2+} \) ions four times
will cause the equilibrium
concentration of \( \boldsymbol{F}^{-} \) ions to change to
times the initial value.
A . 4
B. \( \frac{1}{2} \)
\( c \cdot 2 \)
D.
| 1 |
Chemistry
|
\( (C-C l) \) bond in \( C H_{2}=C H-C l \)
(vinyl chloride) is stabilised in the same
way as in:
A. benzyl chloride
B. benzoyl chloride
c. chlorobenzene
D. allyl chloride
| 1 |
Chemistry
|
:
| 3 |
Physics
|
A square lawn is surrounded by a path
\( 2.5 m \) wide. If the are of path is \( 165 m^{2} \) find the area of the lawn
| 2 |
Maths
|
The force \( F \) which is applied to \( 1 k g \)
block initially at rest varies linearly with
time as shown in the figure. Find velocity of the block at \( t=4 s \)
A \( .100 \mathrm{m} / \mathrm{s} \)
B. \( 200 \mathrm{m} / \mathrm{s} \)
\( c \cdot 20 m / s \)
D. \( 4 m / s \)
| 3 |
Physics
|
The radii of two of the first four Bohr
orbits of the hydrogen atom are in the
ratio \( 1: 4 . \) The energy difference
between them may be
A. either \( 12.09 e V \) or \( 3.4 e V \)
B. either \( 2.55 e V \) or \( 10.2 e V \)
c. either \( 13.6 e V \) or \( 3.4 e V \)
D. either \( 3.4 e V \) or \( 0.85 e V \)
| 1 |
Chemistry
|
What is electric field intensity at any point on the axis of a charged rod of length ' \( L \) ' and linear charge density' \( \lambda \) '?
The point is separated from the nearer end by a.
| 3 |
Physics
|
A particle is moving in a circular path of
radius a under the action of an attractive potential \( U=-\frac{K}{2 r^{2}} . \) Its total
energy is
| 3 |
Physics
|
Solve
\( \mathbf{7}(\boldsymbol{x}-\mathbf{2})=\mathbf{4 9} \)
| 2 |
Maths
|
The difference between simple interest and compound interest at yearly intervals, on Rs. 3000 for 2 years at \( 6 \% \)
is
A . Rs. 20.80
B. Rs. 15.80
c. Rs. 10.80
D. Rs. 9.80
| 2 |
Maths
|
Which of the following is a state of
matter?
A. Quark-gluon plasma
B. Quantum spin liquid
c. superfluid
D. All of above
| 1 |
Chemistry
|
Initially a body is a rest. If its
acceleration is \( 5 m s^{-2} \) then the
distance travelled in the \( 18^{t h} \) second is:
\( \mathbf{A} \cdot 86.6 m \)
B. \( 87.5 m \)
\( c .88 m \)
D. \( 89 m \)
| 3 |
Physics
|
There is a fixed potential difference
between the two ends of a
potentiometer. Two cells are connected
in series in such a way that in one
arrangement they help each other where as in the second arrangement they oppose each other. The balance point for these two combinations is obtained at
\( 120 \mathrm{cm} \) and \( 60 \mathrm{cm} \) length respectively. The ratio of the emf of the cell is:
A \( \cdot 2: \)
B. 3:
\( c \cdot 1: 1 \)
D. 4:
| 3 |
Physics
|
toppr
Q Type your question_
spool has mass \( m \), edge radius \( K \) and
is wound up to a radius \( r, \) its moment of
inertia about its own axis is \( \boldsymbol{I} \). The free
end of the thread is attached as shown
in figure. So that the thread is parallel
to the inclined plane. \( T \) is the tension in
the thread. Which of the following is
correct?
This question has multiple correct options
A. The linear acceleration of the spool axis down the
slope is \( \frac{m g \sin \theta-T}{m} \)
B. Angular accelerations is \( \frac{T r}{2 I} \)
C. The linear acceleration of the spool axis down the
plane is \( \frac{T r^{2}}{I} \)
D. The acceleration of the spool axis down the slope is
\( \frac{\frac{1}{1} \theta}{m r^{2}} \)
| 3 |
Physics
|
Subtract the following algebraic
expressions.
\( -4 g \) from \( -10 g \)
\( A \cdot 6 g \)
B. - -14g
c. \( -6 g \)
D. 148
| 2 |
Maths
|
When two bodies collide, they
each other.
A. Push
B. Pull
c. Moves towards
D. All
| 3 |
Physics
|
Anhydrous magnesium chloride is obtained by heating the hydrated salt with dry
A. HCl.
в. Nacı
\( c \cdot \) both
D. none
| 1 |
Chemistry
|
2-Methylpropane on monochlorination under photochemical condition gives:
A. 2 -Chloro-2-methylpropane as major product.
B. (1:1) Mixture of 1-chloro-2-methylpropane and 2chloro-2-methylpropane.
C. 1 -Chloro-2-methylpropane as major product
D. (1:9) Mixture of 1-chloro-2-methylpropane and 2chloro-2-methylpropane.
| 1 |
Chemistry
|
To measure the radius of the drop
Millikan used \( _{-1-}- \) law of freely
falling drops.
A. Poiseuille's
B. Ostwald's
c. Brewester's
D. stoke's
| 3 |
Physics
|
The centroid of Tetraheadron
(3,4,5),(2,5,9),(5,2,8),(2,5,2)
| 2 |
Maths
|
If \( \boldsymbol{A}=\left[\begin{array}{ll}\mathbf{3} & \mathbf{7} \\ \mathbf{2} & \mathbf{5}\end{array}\right] \) and \( \boldsymbol{B}=\left[\begin{array}{cc}-\mathbf{3} & \mathbf{2} \\ \mathbf{4} & -\mathbf{1}\end{array}\right] \) find
the \( \boldsymbol{A}+\boldsymbol{B} \)
| 2 |
Maths
|
If \( \sin \theta=\frac{1}{2}, \) show that \( (3 \cos \theta- \)
\( \left.4 \cos ^{3} \theta\right)=0 \)
| 2 |
Maths
|
Observe the experimental sets \( [A] \) and
\( [\boldsymbol{B}] \)
Observe the test tube \( A \) and \( B \). From the
list given below, choose the
combination of response of shoot and
root that are observed in \( B \)
A. Positive phototropism and positive geotropism
B. Negative phototropism and positive geotropism
C. Positive phototropism and negative geotropism
D. Only negative phototropism
| 0 |
Biology
|
The odour of phosphorus pentoxide is:
A. garlic
B. sour
C. pungent
D. none of these
| 1 |
Chemistry
|
One side of a parallelogram is \( 8 \mathrm{cm} . \) If the corresponding altitude is \( 6 \mathrm{cm}, \) then its area is given by
A \( \cdot 24 \mathrm{cm}^{2} \)
B. \( 36 \mathrm{cm}^{2} \)
c. \( 40 \mathrm{cm}^{2} \)
D. \( 48 \mathrm{cm}^{2} \)
| 2 |
Maths
|
A Pitot tube (Shown in figure above) is mounted along the axis of a gas
pipeline whose cross-sectional area is
equal to \( S \). Assuming the viscosity to be negligible, the volume of gas flowing across the section of the pipe per unit time, if the difference in the liquid columns is equal to \( \Delta h, \) and the densities of the liquid and the gas are
\( \rho_{0} \) and \( \rho \) respectively is \( Q= \) \( \boldsymbol{S} \sqrt{\frac{\boldsymbol{x} \boldsymbol{\Delta} \boldsymbol{h} \boldsymbol{\rho}_{0} \boldsymbol{g}}{\boldsymbol{\rho}}} . \) Find the value of \( \boldsymbol{x} \)
| 3 |
Physics
|
Which of the following reactions shows
reducing nature of \( \boldsymbol{H}_{2} \boldsymbol{O}_{2} ? \)
A. \( P b S+4 H_{2} O_{2} \rightarrow P b S O_{4}+4 H_{2} O \)
B. \( A g_{2} O+H_{2} O_{2} \rightarrow 2 A g+H_{2} O+O_{2} \)
c. \( 2 H C H O+H_{2} O_{2} \rightarrow 2 H C O O H+H_{2} O \)
D. \( N a_{2} S O_{3}+H_{2} O_{2} \rightarrow N a_{2} S O_{4}+H_{2} O \)
| 1 |
Chemistry
|
Identify the differentiate between leucoplasts and chromoplasts.
A. Leucoplasts- colourless plastids, chromoplasts coloured plastids
B. Leucoplasts- coloured plastids, chromoplasts colourless plastids
c. Leucoplasts- help in storage of food, chromoplasts help in photosynthesis, pollination
D. Both A and C
| 0 |
Biology
|
If \( \boldsymbol{A}+\boldsymbol{B}+\boldsymbol{C}=\boldsymbol{\pi}, \) then prove the
following \( \sin 2 A+\sin 2 B+\sin 2 C= \)
\( 4 \sin A \cdot \sin B \cdot \sin C \)
| 2 |
Maths
|
The small aerating pores seen on cork layer of woody stem are
A . Guard cells
B. Subsidiary cells
c. Trichomes
D. Lenticels
| 0 |
Biology
|
A solid sphere is rolling purely on a rough horizontal surface with speed of
center \( u=12 \mathrm{m} / \mathrm{s} . \) It collides
inelastically with a smooth vertical wall at a certain moment, the coefficient of restitution being \( \frac{1}{2} . \) How long (in sec) after the collision, the sphere will begin
pure rolling? [coefficient of friction between the
sphere and the ground is \( \frac{3}{35} \)
A . 16
B . 12
\( c .6 \)
D. 13
| 3 |
Physics
|
In gaseous discharge tube,the colour of
light emitted by helium is:
A. yellow
B. red
c. blue
D. green
| 1 |
Chemistry
|
The number of bijection that can be
defined from \( \boldsymbol{A}=\{1,2,8,9\} \) to \( \boldsymbol{B}= \)
\{3,4,5,10\} is
\( \mathbf{A} \cdot 4^{4} \)
B \( \cdot 4^{2} \)
\( c \cdot 24 \)
D. 18
| 2 |
Maths
|
Which block of the periodic table contains elements with the general electronic configuration? \( (n-2) f^{1-14}(n-1) d^{0-1} n s^{2} \)
A. s-block
B. p-block
c. d-block
D. f-block
| 1 |
Chemistry
|
For polynomial \( \boldsymbol{P}(\boldsymbol{x})=\mathbf{6} \boldsymbol{x}^{\mathbf{3}}+\mathbf{2} \mathbf{9} \boldsymbol{x}^{\mathbf{2}}+ \)
\( \mathbf{4 4} \boldsymbol{x}+\mathbf{2 1}, \) find \( \mathbf{P}(-\mathbf{2}) \)
| 2 |
Maths
|
Solve the following equations. \( \sqrt{3}-\tan x=\tan \left(\frac{\pi}{4}-x\right) \)
| 2 |
Maths
|
Prove that \( \log _{2} 3 \) is an irrational
number.
| 2 |
Maths
|
Methanol and acetone can be separated
by:
A. Fractional distillation
B. Distillation
c. Steam distillation
D. Vacuum distillation
| 1 |
Chemistry
|
Find the arithmetic mean of first 10
natural numbers.
A . 55
в. 550
\( c .5 .5 \)
D. None of the above
| 2 |
Maths
|
Which of the following is a polyamide?
A. Teflon
в. Nylon -6,6
c. Terylene
D. Bakelite
| 1 |
Chemistry
|
A force-time graph for the motion of a body is shown in figure. Change in linear momentum between 0
and 8 s is:
A. zero
B. 4 N-s
\( c \cdot 8 \) Ns
D. None
| 3 |
Physics
|
The common ratio of \( \mathrm{GP} \mathbf{4}, \mathbf{8}, \mathbf{1 6}, \mathbf{3 2}, \dots . \)
is
\( A \cdot 2 \)
B. 3
\( c \cdot 4 \)
\( D \)
| 2 |
Maths
|
Which type of organisms are called as
pathogens?
A. The organisms which cause a disease.
B. The organisms which cause weakness.
C. The organisms which cause an infection.
D. none of these
| 1 |
Chemistry
|
\( \boldsymbol{C a} \boldsymbol{C O}_{3}(\boldsymbol{s}) \rightleftharpoons \boldsymbol{C a O}(\boldsymbol{s})+\boldsymbol{C O}_{2}(\boldsymbol{g}), \boldsymbol{K}= \)
\( 10^{-9} \) at \( 300 K . \) The value of \( p_{c o_{2}} \) is \( 10^{-x} \)
\( x \) is
| 1 |
Chemistry
|
Rational numbers are closed under
substraction.
A. True
B. False
c. Cannot be determined
D. None
| 2 |
Maths
|
Let \( f(x) \) be a function in [0,5] such that
\( \boldsymbol{f}^{2}(\boldsymbol{x})=\mathbf{1} \forall \boldsymbol{x} \in[\mathbf{0}, \mathbf{5}] \) and \( \boldsymbol{f}(\boldsymbol{x}) \) is
discontinuous at all integers in \( [\mathbf{0}, \mathbf{5}] \) Find total number of fuctions.
| 2 |
Maths
|
Three square with the same center and corresponding parallel sides are drawn. The distance between the the sides of
successive square is 3 and the side length of the largest square is \( 22, \) as shown. what is the perimeter of the smallest square?
A . 40
B. 100
c. 10
D. 64
E. 20
| 2 |
Maths
|
A body of mass \( 2 k g \) initially at rest moves under the action of an applied
horizontal force of \( 7 N \) on a table with
coefficient of kinetic friction \( =\mathbf{0 . 1} \)
Compute the Work done by the applied force in \( 10 s \)
в. \( 890 J \)
c. \( 1000 J \)
D. \( 5000 J \)
| 3 |
Physics
|
Which of the following is/are true?
This question has multiple correct options
A. Van der Waals forces are responsible for the formation of molecular crystals
B. Branching lowers the boiling points of isomeric organic compounds due to decrease in van der Waals forces of attraction.
C. In graphite, van der Waals forces act between the carbon layers.
D. In diamond, van der Waals forces act between the carbon layers.
| 1 |
Chemistry
|
Taxonomical aids are helping hands of taxonomy, and two of them functions for ex-situ conservation strategy, these
are?
A. Botanical garden and herbarium
B. Zoological parks and museums
c. zoological parks and botanical gardens
D. Museums and botanical gardens
| 0 |
Biology
|
The minimum speed of wind necessary for the satisfactory working of a wind generator to produce electricity is about:
A. \( 15 \mathrm{km} / \mathrm{h} \)
B. 20 \( \mathrm{m} / \mathrm{h} \)
\( c \cdot 12 m / s \)
D. \( 50 \mathrm{km} / \mathrm{h} \)
| 3 |
Physics
|
What is the special technique used for
separation and identification of the constituents in the mixture?
| 1 |
Chemistry
|
In a particular experiment, a gas undergoes adiabatic expansion satisfying the equation \( V T^{3} \) =constant.
The ration of specific heats, \( \boldsymbol{Y} \) is:
A . 4
B. 3
\( c \cdot \frac{5}{3} \)
D.
| 3 |
Physics
|
Find out the current in the circuit
shown above. (Assume the diode used
in the circuit is ideal)
A. \( 20 \mathrm{mA} \)
B. 200 mA
c. \( 0.2 \mathrm{A} \)
D. \( 40 \mathrm{A} \)
| 3 |
Physics
|
If \( M(x, y) \) is equidistant from \( A(a+ \) \( b, b-a) \) and \( B(a-b, a+b), \) then
A. \( b x+a y=0 \)
В. \( b x-a y=0 \)
\( \mathbf{c} \cdot a x+b y=0 \)
D. \( a x-b y=0 \)
| 2 |
Maths
|
\( \boldsymbol{T}_{50} \) (Half-life period) of first - order
reaction is 10 minute. Starting with
\( 10 m o l L^{-1}, \) rate after 20 minute is :
A \( \cdot 0.0693 m o l L^{-1} \min ^{-1} \)
В. \( 0.0693 \times 2.5 \) molL\( ^{-1} \) min \( ^{-1} \)
\( \mathbf{c} \cdot 0.0693 \times 5 m o l L^{-1} \min ^{-1} \)
D. \( 0.0693 \times 10 \) molL\( ^{-1} \) min \( ^{-1} \)
| 1 |
Chemistry
|
The \( p H \) of a solution which is \( 0.1 M \) sodium acetate and \( 0.01 M \) acetic acid
\( \left(p K_{a}=4.74\right) \) would be:
A . 4.2
B. 5.1
\( c .5 .74 \)
D. None of these
| 1 |
Chemistry
|
In a vacuum diode, the space around
the cathode which is filled with
electrons, is called
A. space charge
B. electric field
c. magnetic field
D. electron cloud
| 3 |
Physics
|
When sulphur dioxide is passed in an acidified \( K_{2} C r_{2} O_{7} \) solution, the
oxidation state of sulphur is changed from:
A . +4 to 0
B. +4 to +2
\( \mathbf{c} \cdot+4 \) to +6
D. +6 to +4
| 1 |
Chemistry
|
The rate constant of a first order
reaction is 0.0693 min\( ^{-1} \)
Time (in minutes) required for reducing
an initial concentration of 20 mol \( l i t^{-1} \)
to 2.5 mol \( l i t^{-1} \) is :
A . 40
B. 30
c. 20
D. 10
| 1 |
Chemistry
|
When the light is very bright, then:
A. Iris makes pupil expand
B. Iris makes pupil contract
C. Iris and pupil remain as they are
D. None of these
| 3 |
Physics
|
In which of the following process the system and surrounding comes back to its original state after the process is complete?
A. Quasi-static Process
B. Reversible process
c. Both a and \( b \)
D. Isobaric process
| 3 |
Physics
|
If the ratio of the masses of two plane
what will be the ratio of their accelera
| 3 |
Physics
|
Translocation of organic materials is best explained by
A. Active transport
B. Transpiration pull
c. Imbition theory
D. Mass flow hypothesis
| 0 |
Biology
|
The solution showing positive deviation from ideal behaviour has
azeotrope.
A. negative
B. positive
c. neutral
D. ideal
| 1 |
Chemistry
|
\( \int\left(\frac{4 e^{x}-25}{2 e^{x}-5}\right) d x=A x+ \)
\( \boldsymbol{B} \log \left|\mathbf{2} e^{x}-\mathbf{5}\right|+\boldsymbol{c}, \) then
A. \( A=5, B=3 \)
В. \( A=5, B=-3 \)
\( \mathbf{c} \cdot A=-5, B=3 \)
D. \( A=-5, B=-3 \)
| 2 |
Maths
|
Why defects in the myelin sheath is
dangerous?
A. Action potentials would be conducted too slowly along the neurons
B. Muscles would not contract when stimulated
C. The thyroid gland would not be able to produce thyroxine
D. The bone tissue would not be properly maintained
| 0 |
Biology
|
A conducting square loop of side \( L \) and
resistance \( R \) moves in it's plane with a
uniform velocity \( v \) perpendicular to one of it's sides. A magnetic induction \( B \) constant in time and space, pointing perpendicular to and into the plane of the loop exists everywhere. The current induced in the loop is
A \( \cdot \frac{B L v}{R}, \) clockwise
B. \( \frac{B L v}{2 R} \) clockwise
c. \( \frac{2 B L v}{2 R} \) anticlockwise
D. zero
| 3 |
Physics
|
An object of mass ' \( m \) ' is kept on a
horizontal platform. The platform is
oscillating vertically with amplitude ' \( a \) '
and period 'T". The weight of object at lowest position is:
A \( . m g+m a \omega^{2} \)
B. \( m a \omega^{2} \)
\( \mathrm{c} \cdot m g \)
D. \( m g-m a \omega^{2} \)
| 3 |
Physics
|
Which end of the inductor, \( a \) or \( b \), is at a
higher potential?
| 3 |
Physics
|
Assertion
Extraction of gold from its native ore
involves leaching the metal ore with dilute solution of NaCN in presence of
air.
Reason
This is an oxidation reaction and leads
to the formation of a soluble complex.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct
| 1 |
Chemistry
|
A wire carrying current \( i \) has the configuration shown in the figure. Two semi-infinite straight sections, each tangent to the same circle, are
connected by a circular arc, of angle \( \boldsymbol{\theta} \)
along the circumference of the circle,
with all sections lying in the same plane. What must \( \theta \) (in rad) be in order
for \( B \) to be zero at the center of
the circle?
| 3 |
Physics
|
Light propagates \( 2 \mathrm{cm} \) distance in
glass of refractive index 1.5 in time \( t_{0} \)
In the same time \( t_{0}, \) light propagates a
distance of \( 2.25 \mathrm{cm} \) in a medium. The
refractive index of the medium is :
A \( .4 / 3 \)
B. \( 3 / 2 \)
\( c \cdot 8 / 3 \)
D. none of these
| 3 |
Physics
|
The correct chemical formula for
ammonium phosphate is:
A. \( N_{2} H_{6} P O_{4} \)
в. \( \left(N H_{3}\right)_{3} P O_{4} \)
\( \mathrm{c} \cdot\left(\mathrm{NH}_{4}\right)_{3} \mathrm{PO}_{4} \)
D. \( \left(N H_{4}\right)_{2} P O_{4} \)
| 1 |
Chemistry
|
Solve:
\( \lim _{u \rightarrow 1} \frac{\sqrt{u^{2}+8}}{\sqrt{u^{2}+3}}-\frac{\sqrt{10-u^{2}}}{\sqrt{5-u^{2}}} \)
| 2 |
Maths
|
Assertion
G-phase is also called anaphase, as during this phase the cell stores ATP for
cell division.
Reason
Cell produces structural and functional proteins. Cell's metabolic rate is high and is controlled by the enzymes.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is incorrect but Reason is correct
D. Both Assertion and Reason are incorrect
| 0 |
Biology
|
n figure , one car is at rest and velocity of light from head light is \( C \), then velocity of light from head light for the moving car at velocity v,would be
| 3 |
Physics
|
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