BITSAT Physics Test - 5 - JEE MCQ

A dry cell has an e.m.f. of 1.5 V and an internal resistance of 0.05 Ω. The maximum current obtainable from this cell for a very short time interval is

Terminal potential difference of battery depends on

Particle nature is shown by

Which of the following statement is not correct

When a.d.c. motor operates at 200 V, its initial current is 5 A, but when it runs at maximum speed, the current is only 3 A. What is its back emf ?

Inside a hollow charged spherical conductor, the potential at every point

If identical charges -q are placed at each corner of a cube of side b, then electric potential energy of charge +q, which is placed at centre of the cube, will be

A motorcyclist of mass m is to negotiate a curve of radius r with a speed ν. The minimum value of the coefficient of friction so that this negotiation may take place safely, is

An earth satellite of mass m revolves in a circular orbit at a height h from the surface of the earth. R is the radius of the earth and g is acceleration due to gravity at the surface of the earth. The velocity of the satellite in the orbit is given by

A perfect black body emits radiation at temperature 300 K. If it radiates 16 times this amount, then its temperature will be

The r.m.s. velocity of a gas molecules is 100√3 m−s^⁻1. The most probable velocity of the molecules is

A galvanometer having a resistance of 8 ohm is shunted by a wire of 2 ohm. If the total current is 1 ampere, the part of it passing through the shunt will be

A tangent galvanometer is used to measure

A horizontal pipe line carries water in a streamline flow. At a point along the pipe where cross-sectional area is 10 cm², the velocity of water is 1 m-s^⁻1 and pressure is 2000 Pa. The pressure of water, at another point where cross-sectional area is 5 cm², is (Density of water = 1000 kg-m^⁻3)

Hydraulic press is based on

A wire can be broken by applying a load of 200 N.The force required to break another wire of the same length and same material, but double in diameter, is

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

In a vertical circle of radius r, at what point in its path a particle has tension equal to zero

Four bodies P, Q, R and S are projected with equal velocities having angles of projection 15^o, 30^o, 45^o and 60^o with the horizontal respectively. The body having shortest range is

A diwali rocket is ejecting 0.05 kg of gases per second at a velocity of 400 m/sec. The accelerating force on the rocket is

If tube length of astronomical telescope is 105 cm and magnifying power is 20 for normal setting, calculate the focal length of objective

Which of the following equation does not represent a simple harmonic motion ?

A hollow sphere is filled with water through a small hole in it. It is hung by a long thread and made to oscillate. As the water slowly flows out of the hole at the bottom, the period of oscillation will

An object is placed at a distance of 40 cm in front of a concave mirror of focal length 20 cm. The image produced is

A flywheel starts from rest and gains a speed of 540 rev-min^⁻1 in 6 s. Angular acceleration of the flywheel will be

A solid cylinder 30 cm in diameter at the top of an inclined plane 2.0 m high is released and rolls down the incline without loss of energy due to friction. Its linear speed at the bottom is

A Carnot engine used first an ideal monoatomic gas and then an ideal diatomic gas. If the source and sink temperature are 411^oC and 69^oC respectively and the engine extracts 1000 J of heat in each cycle, then area enclosed by the P-V diagram is