Question 1 : <p>Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K1 and K2. The thermal conductivity of the composite rod will be :-<br/></p><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ad7364dbcd62830aaeb9526"/>
Question 2 : A closed spherical surface of radius {tex} \mathrm { R } {/tex} encloses an electric dipole. The net electric flux through the surface is<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5f0424f7642b9f2cba2cfe65"><br>
Question 3 :
Magnetic flux {tex} \phi {/tex} in weber in a closed circuit of resistance {tex} 10 \mathrm { W } {/tex} varies with time {tex} t ( \sec ) {/tex} as {tex} \phi = 6 t ^ { 2 } {/tex} {tex} - 5 t + 1 {/tex}. The magnitude of induced current at {tex} t {/tex} {tex} = 0.25 {/tex}s is
Question 4 :
The frequencies of X-rays, {tex} \gamma {/tex} -rays and ultraviolet rays are respectively {tex} a , b , {/tex} and {tex} c . {/tex} Then
Question 5 :
A projectile is projected at an angle of {tex} 45 ^ { \circ } {/tex} with speed u. The radius of curvature of its trajectory at the maximum height is
Question 6 :
A particle of mass m is moving in a horizontal circle of radius r under a centripetal force equal to {tex}\frac {-K}{r^2}\hat{r}{/tex} , where K is constant. The total energy
of the particle, is :-
Question 7 :
In thermodynamic processes, which of the following statements is not true?
Question 8 :
If {tex}f_1{/tex} , {tex}f_2{/tex} and {tex}f_3{/tex} are the frequency of corresponding {tex}k_\alpha{/tex}, {tex}k_\beta{/tex}and {tex}L_\alpha{/tex} x-rays of an element then-
Question 9 :
A block of mass 60 kg just slides over a horizontal distance of 0.9 m. If the coefficient of friction between their surface is 0.15 then work done against friction will be
Question 10 :
A capillary tube is immersed vertically in water and the height of the water column is {tex} x {/tex}. When this arrangement is taken into a mine of depth {tex} d {/tex}, the height of the water column is {tex} y {/tex}. If {tex} R {/tex} is the radius of earth, the ratio {tex} \frac { x } { y } {/tex} is:
Question 11 :
The intensity ratio of the two interfering beams of light is {tex}\beta \frac{I_{max} - I_{min}}{I_{max} + I_{min}}{/tex}
Question 12 : Two identical bar magnets are fixed with their centres at a distance d apart. A stationary charge Q is placed at P in between the gap of the two magnets at a distance D from the centre O as shown in the figure <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5b02ced57f6cca08b9fd9b51"> The force on the charge Q is :-
Question 13 :
The average work done by a human heart while it beats once is 0.5 J. What is the power used by heart if it beats 72 hours in a minute
Question 14 :
If two soap bubbles of different radii are connected by a tube. Then
Question 15 :
At {tex} 0 ^ { \circ } \mathrm { K } {/tex} which of the following properties of a gas will be zero?
Question 16 :
Two waves whose intensities are 9 and 16 are made to interfere. The ratio of maximum and minimum intensities in the interference pattern is
Question 17 :
A particle performs uniform circular motion with angular momentum L. If the angular frequency of the particle is doubled and kinetic energy is halved, its angular momentum becomes
Question 18 :
The current in a coil of {tex} \mathrm { L } = 40 \mathrm { mH } {/tex} is to be increased uniformly from {tex} 1 \mathrm { A } {/tex} to {tex} 11 \mathrm { A } {/tex} in {tex} 4 \mathrm { milli \ sec } {/tex} . The induced e.m.f. will be
Question 20 :
An object undergoing SHM takes 0.5 s to travel from one point of zero velocity to the next such point. The distance between those points is 50 cm. The period, frequency and amplitude of the motion is
Question 21 : A rough vertical board has an acceleration {tex}\mathrm a {/tex} along the horizontal so that a block of mass {tex} \mathrm { M } {/tex} pressing against it does not fall. The coefficient of friction between block and the board is<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5f0420beeb5b142d10d75cc4"><br>
Question 22 :
Two astronauts are floating in gravitational free space after having lost contact with their spaceship. The two will :-
Question 23 :
In an a.c. circuit {tex} \mathrm { V } {/tex} and {tex} \mathrm { I } {/tex} are given by<br>{tex} \mathrm { V } = 100 \sin ( 100 \mathrm { t } ) {/tex} volts <br>{tex} \mathrm { I } = 100 \sin ( 100 \mathrm { t } + \pi / 3 ) \mathrm { m } \mathrm { A } {/tex} <br>The power dissipated in the circuit is<br>
Question 24 :
The path difference between the two waves:<br>{tex} y _ { 1 } = a _ { 1 } \sin \left( \omega t - \frac { 2 \pi x } { \lambda } \right){/tex} <br>and {tex} y _ { 2 } = a _ { 2 } \sin \left( \omega t - \frac { 2 \pi x } { \lambda } + \phi \right) {/tex} will be
Question 25 : Two monkeys of masses {tex} 10 \mathrm { kg } {/tex} and {tex} 8 \mathrm { kg } {/tex} are moving along a vertical rope which is light and inextensible, the former climbing up with an acceleration of {tex} 2 \mathrm { m } / \mathrm { s } ^ { 2 } {/tex} while the latter coming down with a uniform velocity of {tex} 2 \mathrm { m } / \mathrm { s } {/tex}. Find the tension (in Newton).<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5f043047642b9f2cba2cffa6"><br>
Question 26 :
If yellow light emitted by sodium lamp in Young's double-slit experiment is replaced by the monochromatic blue light of the same intensity
Question 27 :
The correct statement of the law of equipartition of energy is
Question 28 :
A man projects a coin upwards from the gate of a uniformly moving train. The path of coin for the man will be
Question 29 :
Electric field inside a copper wire of length 10 metres, resistance 2 ohm connected to a 10 volt battery is
Question 30 :
How much energy is required for a body of mass {tex} 1000 \mathrm { kg } {/tex} to escape from the earth? {tex} \left( \mathrm { g } = 9.8 \mathrm { m } / \mathrm { s } ^ { 2 } , \mathrm { R } \right. {/tex} {tex} = 6400 \mathrm { km } ) {/tex}
Question 31 :
The angle between A = i + j and B = i - j is
Question 32 :
A body falls on the ground from a height of {tex} 10 \mathrm { m } {/tex} and rebounds to a height of {tex} 2.5 \mathrm { m } {/tex}. Then the ratio of velocities of the body just before and just after the collision will be
Question 33 :
If the number of turns per unit length of a coil of a solenoid is doubled, the self inductance of the solenoid will
Question 34 :
If a current increases from zero to one ampere in 0.1 second in a coil of {tex} 5 \mathrm { mH } {/tex}, then the magnitude of the induced e.m.f. will be
Question 35 :
Choose any one of the following four responses.
A. If both Assertion & Reason are True but Reason
is not a correct explanation of the Assertion.
B. If both Assertion & Reason are False.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are True & the
Reason is a correct explanation of the Assertion.
<br>Assertion :-Sine and cosine functions are periodic functions.
Reason :- Sinusoidal functions repeats it values after a definite interval of time.
Question 36 : Three blocks of masses {tex} m _ { 1 } , m _ { 2 } {/tex} and {tex} m _ { 3 } {/tex} are connected by a massless strings, as shown, on a frictionless table. They are pulled with a force {tex} T _ { 3 } = 40 \mathrm { N } {/tex}. If {tex} m _ { 1 } = 10 \mathrm { kg } , m _ { 2 } = 6 \mathrm { kg } {/tex} and {tex} m _ { 3 } = 4 \mathrm { kg } {/tex}. The tension {tex} \mathrm { T } _ { 2 } {/tex} will be<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5f042694eb5b142d10d75deb"><br>
Question 37 :
A body is initially at rest. It undergoes one- dimensional motion with constant acceleration. The power delivered to it at time {tex} t {/tex} is proportional to:
Question 38 :
A body having initial velocity of {tex} 10 \mathrm { m } / \mathrm { s } {/tex} moving on a rough surface comes to rest after moving {tex} 50 \mathrm { m } {/tex}. What is coefficient of friction between the body and surface? {tex} \left( \mathrm { g } = 10 \mathrm { m } / \mathrm { s } ^ { 2 } \right) {/tex}
Question 40 :
Choose any one of the following four responses.
A. If both Assertion & Reason are True but Reason
is not a correct explanation of the Assertion.
B. If both Assertion & Reason are False.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are True & the
Reason is a correct explanation of the Assertion.
<br>Assertion :-Strain is a unitless quantity.
Reason :- Strain is equivalent to force.
Question 41 :
Energy of simple harmonic motion depends upon {tex} [ \text { Here, } a = \text { amplitude, } \omega = \text { angular velocity } ] {/tex}
Question 43 : A spool is pulled horizontally by two equal and opposite forces on a rough surface. The correct statement is :<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5f0424f8eb5b142d10d75d94"><br>
Question 44 :
Choose any one of the following four responses.
A. If both Assertion & Reason are True & the
Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are False.
C. If both Assertion & Reason are True but Reason is
not a correct explanation of the Assertion.
D. If Assertion is True but the Reason is False.
Assertion :- Gravitational force is always directed towards the centre of the body.
Reason :- Centre of gravity always coincides with the centre of mass.
Question 45 :
A ray of monochromatic light suffers minimum deviation of {tex} 38 ^ { \circ } , {/tex} while passing through a prism of refracting angle {tex} 60 ^ { \circ } . {/tex} Refractive index of the prism material is
