Physics Test - 11

The power dissipated across an 8 Ω resistor in the circuit shown here is 2 W. The power dissipated (in watts) across a 3 Ω resistor is:

In the given figure, each plate of capacitance C has a partial value of charge equal to

In an arrangement of resistances shown in the diagram, the potential difference between B and D will be zero, when the unknown resistance X is

A police jeep moving with a velocity of 45 km/hr is chasing a thief in another jeep moving with a velocity of 153 km/hr. The police fire a bullet with muzzle velocity of 180 m/s. The velocity with which it will strike the jeep of the thief is

The engine of a train crosses an electric pole with velocity 'u', and the last compartment of the train crosses the same pole with a velocity 'v'. The velocity with which the middle part of the train crosses the pole is

The graph below shows the variation of velocity (v) of a body with position (x) from the origin O.

Which of the following graphs correctly represents the variation of acceleration (a) with position (x)?

If a body travels half the distance with velocity v1and the next half with velocity v2, then its average velocity will be given by

The equation of transverse wave is given by y = 5 sin 2π,where distance is in cm and time in second. The wavelength of wave will be

A stretched wire of same length under a tension vibrates with its fundamental frequency. Its length is decreased by 45% and tension is increased by 21%. Now, its fundamental frequency

The equation of a wave travelling on a string is y = 4 sin  where x and y are in cm and t in seconds. The velocity of the wave is

A sonometer wire of density 'd' and radius 'a' is held between two bridges at a distance 'l' apart. The wire has a tension 'T'. The fundamental frequency of the wire is

A tube, closed at one end containing air, produces, when excited, the fundamental note of frequency 512 Hz. If the tube is open at both ends, then the fundamental frequency that can be excited will be (in Hz)

Three progressive waves A, B and C are shown in the figure.

With respect to A, the progressive wave