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Physics · PYQ NEET UG 2017
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Physics · MOTION IN A PLANE
A particle undergoes uniform circular motion in a path of radius \( R \). If its frequency of revolution is doubled while the radius of the circle is halved, the new centripetal acceleration becomes how many times its initial centripetal acceleration?
Read answer →Physics · PYQ NEET UG 2026
Solar system, the time-period of revolution of a planet tracing a circular orbit of radius R is proportional to :
Read answer →Physics · SYSTEMS OF PARTICLES AND ROTATIONAL MOTION
An irregular lamina is suspended successively from two different points A and B. The vertical lines drawn through the points of suspension intersect at point G. This intersection point G represents the:
Read answer →Physics · MOTION IN A STRAIGHT LINE
A particle starts from rest at \( t = 0 \) and moves in a straight line with an acceleration given by \( a = (3t + 2)\text{ m/s}^2 \), where \( t \) is in seconds. The velocity of the particle at \( t = 4\text{ s} \) is:
Read answer →Physics · WORK, ENERGY AND POWER
A running athlete of mass \( 70\text{ kg} \) runs with a speed of \( 10\text{ m s}^{-1} \) having kinetic energy \( K_1 \). A stone of mass \( 1\text{ kg} \) dropped from a height of \( 10\text{ m} \) reaches the ground with kinetic energy \( K_2 \approx 10^2\text{ J} \). The ratio \( \frac{K_1}{K_2} \) is equal to:
Read answer →Physics · SYSTEMS OF PARTICLES AND ROTATIONAL MOTION
Three particles of masses \( 1 \text{ kg} \), \( 2 \text{ kg} \), and \( 3 \text{ kg} \) are located at the vertices of an equilateral triangle of side length \( 2 \text{ m} \) in the \( xy \)-plane with \( 1 \text{ kg} \) at \( (0, 0) \) and \( 2 \text{ kg} \) at \( (2, 0) \). The distance of the centre of mass from the \( 1 \text{ kg} \) particle is:
Read answer →Physics · PYQ NEET UG 2018
The volume (\( V \)) of a monatomic gas varies with its temperature (\( T \)) as shown in the graph. The ratio of work done by the gas, to the heat absorbed by it, when it undergoes a change from state \( A \) to state \( B \), is
Read answer →Physics · SYSTEMS OF PARTICLES AND ROTATIONAL MOTION
A lever of length \( 2.4\,\text{m} \) has its fulcrum placed at a distance of \( 40\,\text{cm} \) from the load end. An effort of \( 50\,\text{N} \) is applied at the other end to keep the lever in horizontal equilibrium. The load lifted by the lever and its mechanical advantage (M.A.) are, respectively:
Read answer →Physics · MOTION IN A PLANE
A particle moves along a semi-circular path of radius \( R = 8\text{ m} \) from point A to point B. From point B, it turns and moves along a straight line segment of length \( 12\text{ m} \) perpendicular to the diameter AB. What is the magnitude of the total displacement of the particle from its initial position A?
Read answer →Physics · UNITS AND MEASUREMENT
As illustrated in Fig. 1.1(b), a solid angle \( d\Omega \) is defined as the ratio of intercepted area \( dA \) of a spherical surface to the square of its radius \( r^2 \). A flat circular disc of radius \( R \) is placed perpendicular to the axis at a distance \( d = \sqrt{3}R \) from an apex \( O \). The solid angle subtended by the disc at the apex \( O \) is:
Read answer →Physics · LAWS OF MOTION
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): When a stationary bus starts accelerating suddenly, passengers standing inside are thrown backwards relative to the bus. Reason (R): Due to inertia of rest, the upper part of the passenger's body tends to remain in its initial position while the feet in contact with the floor move forward with the bus. In the light of the above statements, choose the correct answer from the options given below:
Read answer →Physics · UNITS AND MEASUREMENT
A substance of mass \( 5.74\text{ g} \) occupies a volume of \( 1.2\text{ cm}^3 \). Keeping the significant figures in view, its density should be expressed as:
Read answer →Physics · GRAVITATION
Consider the following statements regarding the energies of an Earth satellite in a circular orbit of radius \( r \) (\( r = R_E + h \)): (A) Kinetic energy \( K.E. = \frac{G M_E m}{2r} \) (B) Potential energy \( P.E. = -\frac{G M_E m}{r} \) (C) Total energy \( E = -\frac{G M_E m}{2r} \) (D) \( K.E. = -2E \) Which of the above statements are correct?
Read answer →Physics · WORK, ENERGY AND POWER
A spherical raindrop of radius \( 2\text{ mm} \) falls from a height of \( 500\text{ m} \) above the ground. It experiences air resistance such that its speed upon reaching the ground is \( 10\text{ m s}^{-1} \). Taking \( g = 10\text{ m s}^{-2} \) and the density of water as \( 10^3\text{ kg m}^{-3} \), the work done by the resistive force during the entire descent is:
Read answer →Physics · MOTION IN A STRAIGHT LINE
Car A moves along a straight road with constant velocity \( v_A = 20 \text{ m/s} \). Car B is initially a distance \( d = 150 \text{ m} \) ahead of Car A. At \( t = 0 \), Car B starts from rest and accelerates in the same direction with constant acceleration \( a_B = 2.0 \text{ m/s}^2 \). Find the minimum distance of approach between the two cars.
Read answer →Physics · WORK, ENERGY AND POWER
A raindrop of mass \( 1.00\text{ g} \) falls from a height of \( 1.00\text{ km} \) from rest and hits the ground with a speed of \( 50.0\text{ m s}^{-1} \). Taking \( g = 10\text{ m s}^{-2} \), the work done by the unknown resistive force of the air is:
Read answer →Physics · MOTION IN A STRAIGHT LINE
A body is released from rest from a great height and falls freely under gravity. The ratio of the distance covered by the body in the \( 1^{\text{st}} \), \( 2^{\text{nd}} \), \( 3^{\text{rd}} \), and \( 4^{\text{th}} \) second of its fall is:
Read answer →Physics · SYSTEMS OF PARTICLES AND ROTATIONAL MOTION
Three particles of masses \( 100\text{ g} \), \( 150\text{ g} \), and \( 200\text{ g} \) are placed at the vertices \( O(0,0) \), \( A(0.5\text{ m}, 0) \), and \( B(0.25\text{ m}, 0.25\sqrt{3}\text{ m}) \) of an equilateral triangle respectively. If an additional fourth mass of \( 450\text{ g} \) is placed at a point \( D \) such that the centre of mass of the four-particle system shifts to the origin \( (0,0) \), what are the coordinates of point \( D \)?
Read answer →Physics · SYSTEMS OF PARTICLES AND ROTATIONAL MOTION
If \( |\vec{a} \times \vec{b}|^2 + (\vec{a} \cdot \vec{b})^2 = 144 \) and \( |\vec{a}| = 3 \), then the magnitude of vector \( \vec{b} \) is:
Read answer →Physics · PYQ NEET UG 2016(1)
The angle of incidence for a ray of light at a refracting surface of a prism is \( 45^\circ \). The angle of prism is \( 60^\circ \). If the ray suffers minimum deviation through the prism, the angle of minimum deviation and refractive index of the prism respectively, are
Read answer →Physics · PYQ NEET UG 2019(2)
The value of \( \gamma = \frac{C_p}{C_v} \) for hydrogen, helium and another ideal diatomic gas \( X \) (whose molecules are not rigid but have an additional vibrational mode), are respectively equal to,
Read answer →Physics · UNITS AND MEASUREMENT
One mole of an ideal gas at STP occupies \( 22.4\text{ L} \). Taking the size of a hydrogen molecule to be about \( 1\text{ \AA} \), what is the ratio of molar volume to the atomic volume of a mole of hydrogen molecules?
Read answer →Physics · UNITS AND MEASUREMENT
