Physics questions
20027 published questions with worked solutions.
- The rms speed of oxygen molecule in a vessel at particular temperature is (1+ 5 x )^ 1/2 v is the average speed of the molecule....
- The ratio of powers of two motors is 3 x x+1 , that are capable of raising 300 kg water in 5 minutes and 50 kg water in 2 minutes...
- A vessel of depth 'd' is half filled with oil of refractive index n_1 and the other half is filled with water of refractive index...
- Under isothermal condition, the pressure of a gas is given by P = aV^ -3 , where a is a constant and V is the volume of the gas....
- The source of time varying magnetic field may be (A) a permanent magnet (B) an electric field changing linearly with time (C)...
- Two charges of each magnitude 0.01 C and separated by a distance of 0.4 mm constitute an electric dipole. If the dipole is placed...
- Which of the following Maxwell's equation is valid for time varying conditions but not valid for static conditions:
- A bullet of 10 g leaves the barrel of gun with a velocity of 600 m/s. If the barrel of gun is 50 cm long and mass of gun is 3 kg,...
- A potential V_0 is applied across a uniform wire of resistance R. The power dissipation is P_1. The wire then cut into two equal...
- The elastic potential energy stored in a steel wire of length 20 m stretched through 2 cm is 80 J. The cross sectional area of...
- At a given point of time the value of displacement of a simple harmonic oscillator is given as y = A cos(30°). If amplitude is 40...
- When a resistance of 5 W is shunted with a moving coil galvanometer, it shows a full scale deflection for a current of 250 mA,...
- A thin infinite sheet charge and an infinite line charge of respective charge densities + and + are placed parallel at 5 m...
- A solid sphere is rolling on a horizontal plane without slipping. If the ratio of angular momentum about axis of rotation of the...
- A fish rising vertically upward with a uniform velocity of 8 ms^ -1 , observes that a bird is diving vertically downward towards...
- A flask contains Hydrogen and Argon in the ratio 2 : 1 by mass. The temperature of the mixture is 30°C. The ratio of average...
- A 12 V battery connected to a coil of resistance 6 through a switch, drives a constant current in the circuit. The switch is...
- Two identical particles each of mass 'm' go round a circle of radius a under the action of their mutual gravitational attraction....
- The position vector of a particle related to time t is given by r =(10t i +15t^2 j +7 k )m The direction of net force experienced...
- The half-life of a radioactive nucleus is 5 years. The fraction of the original sample that would decay in 15 years is :