AFMC Physics Mock Test - 2 - NEET MCQ

The current flowing through a wire depends on time as I = 3t² + 2t +5. The charge flowing through the cross-section of the wire in time from t = 0 to t = 2 sec. is

A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be

A beam of electrons is moving with constant velocity in a region having electric and magnetic fields of strength 20 Vm⁻¹ and 0.5 T at right angles to the direction of motion of the electrons. What is the velocity of the electrons

The fact that electric charges are integral multiples of the fundamental electronic charge was proved experimentally by

Phase difference voltage and current in a capacitor in a.c. circuit is

In general, in an alternating current circuit

A hollow metal sphere of radius 5cm is charged such that the potential on its surface is 10 volt. The potential at the centre of the sphere is

Two satellites of earth, S₁ and S₂, are moving in the same orbit. The mass of S₁ is four times the mass of S₂. Which one of the following statements is true?

Heat capacity of a substances is infinite. It means

Figure shows a solid hemisphere with a charge of 5nC distributed uniformly through its volume. The hemisphere lies on a plane and point P is located on the plane, along a radial line from the centre of curvature at distance 15cm. The electric potential at point P due to the hemisphere is:

Supposing the distance between the atoms of a diatomic gas to be constant, its specific heat at constant volume per mole (gram mole) is

A particle of charge -q and mass m moves in a circle of radius r around an infinitely long line charge of linear charge density + λ. Then time period will be:(Where

The vector sum of two forces is perpendicular to their vector differences. In that case, the forces

Two circular discs A and B with equal radii are blackened. They are heated to same temperature and are cooled under identical conditions. What inference do you draw from their cooling curves?

A body of mass 100 g is sliding from an inclined plane of inclination 30º. What is the frictional force experienced if μ = 0.7 ?

A current carrying small loop behaves like a small magnet. If A be its area anf M its magnetic moment, the current in the loop will be

In a capillary tube, water rises upto 3 mm. The height of water that will rise in another capillary tube having one-third radius of the first is

A liquid flows through a pipe of non-uniform cross-section. If A₁ and A₂ are the cross-sectional areas of the pipe at two points, the ratio of velocities of the liquid at these points will be

A piece of steel floates in mercury. The specific gravities of mercury and steel are 13.6 and 7.8 respectively. For covering the whole piece, some water is poured over the mercury. What part of the steel piece will be inside the mercury?

In a surface tension experiment with a capillary tube, water rises upto 8 mm. If the same experiment is repeated on an artificial satellite, which is revoling around the earth, water will tise in capillary tube upto a height of

A square plate of 0.1 m side moves parallel to another plate with a velocity of 0.1 m-s⁻¹, both plates being immersed in viscous liquid. If the viscous force is 0.02 N and the coefficient of viscosity is 1 poise, then distance between the plates is

Rain drops are spherical in shape, because of

A stone dropped from a building of height h and it reaches after t seconds on earth. From the same building if two stones are thrown (one upwards and other downwards) with the same velocity u and they reach the earth surface after t₁ and t₂ seconds respectively, then

A weightless thread can bear tension upto 3.7 N. A stone of mass 500 g is tied to it and revolved in a circular path of radius 4 m in a vertical plane. If g = 10 m−s⁻², then the maximum angular velocity of the stone will be

In a camera, f-number represents

Two similar wires under the same load yield elongations of 0.1 mm and 0.05 mm respectively. If the area of cross-section of the first wire is 4 mm², then the area of cross-section of the second wire is

The total energy of a particle executing simple harmonic motion is 80 J. What is the potential energy when the particle is at a distance of 3/4 of amplitude from the mean position ?