Physics Test - ...

A 220 volt input is supplied to a transformer. The output circuit draws a current of 2.0 ampere at 440 volts. If the efficiency of the transformer is 80%, the current drawn by the primary windings of the transformer is

In a Wheatstone's bridge all the four arms have equal resistance R. If the resistance of the galvanometer arm is also R, the equivalent resistance of the combination as seen by the battery is

The time period of a particle in simple harmonic motion is 8 seconds. At t=0, it is at the mean position. The ratio of the distances traveled by it in the first and second seconds is:

Acceleration-displacement graph of a particle executing SHM is as shown in the figure. The time period of oscillation is (in sec)

Two simple pendulums of lengths 100 cm and 196 cm are in phase at the mean position at a certain time. If T is the time period of shorter pendulum, the minimum time after which they will be again in phase

A pendulum bob is in SHM. The velocity of the bob in the mean position is V. If now the amplitude of oscillation is doubled and the length of the pendulum is also doubled, the speed of the bob in the mean position would be

Two particles are in S.H.M. along parallel straight lines with same amplitude and time period. If they cross each other in opposite directions at the midpoint of mean and extreme positions. Phase difference between them is:

The potential energy of a particle in SHM, 0.2 sec after passing the mean position is 1/4 of its total energy. The period of oscillation is:

The equation of motion of a particle in S.H.M. is given by a=−Bx, where a is the acceleration, B is a constant and x is displacement. The period of oscillation of the particle is: