JIPMER Physics Mock Test - 6 - NEET MCQ

The resistance of a 10 m long wire is 10 Ω. Its length is increased by 25% by stretching the wire uniformly. The resistance of wire will change to (approximately)

The specific resistance of a wire of length 1 m and area of cross-section 0.5 mm² is 25 μΩ-cm. The resistance of the wire will be

When radiation of wavelength λ is incident on a metallic surface, the stopping potential is 4.8 volts. If the same surface is illuminated with radiation of double the wavelength, then the stopping potential becomes 1.6 volts. Then the threshold wavelength for the surface is

Two inductors each of inductance 2 L are joined in parallel. What is their equivalent inductance?

The curve drawn between velocity and frequency of a photon in vaccum will be

If an unchanged capacitor is charged by connecting it to a battery, then the amount of energy lost as heat is

A smooth hemispherical bowl of radius a, whose lowest-point is A, is fixed with its rim uppermost and horizontal. A particle of mass m is projected along the inner surface of the bowl with a speed of 2 √ga from A, so that its motion is in the vertical plane through A. Then the reaction between the particle and the bowl when the particle is at a vertical height 2a/3 above A, is

If 'Q' is the quantity of charge, 'V' the potential and 'C' the capacity of a conductor, they are related as

The maximum speed that can be achieved without skidding by a car on a circular unbanked road of radius R and coefficient of kinetic friction μ, is

The escape velocity on earth is 11.2 ms^-1 . Its value for a planet having double the radius and 8 times mass of the earth is

If earth revolves round the sun is one year. If the distance between them becomes double, the new period of revolution will be

The mode of transmission of heat, in which heat is carried by the movement of heated particles, is

In Young's double slit experiment, distance between slits is 0.28 mm and distance between slits and screen is 1.4 m. Distance between central bright fringe and third bright fringe is 0.9 cm. What is the wavelength of used light?

A perfect gas at 27^oC is heated at constant pressure so as to triple its volume. The temperature of the gas will be

Electron of mass m and charge e is travelling with a speed ν along a circular path of radius r at right angles to a uniform magnetic field B. If the speed of the electron is doubled and the magnetic field is halved, the resulting path would have a radius

A voltmeter of resistance 20000 Ω reads 5 volt. To make it read 20 volt, the extra resistance required is

A length of wire carries a steady current. It is bent first to form a circular coil of one turn. The same length is now bent more sharply to give a double loop of smaller radius. The magnetic field at the centre caused by the same current is

The force between two short bar magnets with magnetic moments M₁ and M₂ whose centres are r meter apart is 8 N, when their axes are in same line. If the separation is increased to 2 r, the force between them is reduced to

The magnetic field at a point at a distance 'd' from the centre on axial line of a very short bar magnet of magnetic moment M is B. The magnetic field at a distance '2d' from centre on equitorial line of magnet of magnetic moment 8 M, will be

If a substance is to be paramagnetic, its atoms must have a

A river water is flowing at 0.5 m-s^-1. The shearing stress between horizontal layers at a distance of 10 cm of the river water is (Viscosity of water = 0.01 poise)

The rate of flow of water in a capillary tube of length 'l' and radius 'r' is 'V'. The rate of flow in another capillary tube of length '2l' and radius '2r' for same pressure difference would be

Two wires of the same material and length, but diameters in the ratio 1 : 2 are stretched by the same force. The elastic potential energy stored per unit volume for the two wires when stretched, will be in the ratio of

Before jumping in water from above a swimmer bends his body to

A body dropped from a height h with an initial speed zero, strikes the ground with a velocity 3 km/h. Another body of same mass is dropped from the same height h with an initial speed -u\'=4 km/h. Find the final velocity of second body with which it strikes the ground

A pendulum bob of mass 50 gm is suspended from the ceiling of an elevator. The tension in the string if the elevator goes up with uniform velocity is approximately

Statement-1: Energy is released when heavy nuclei undergo fission or light nuclei undergo fusion .and
Statement-II: For heavy nuclei , binding energy per nucleon increases with increasing Z while for light nuclei it decrease with increasing Z .