Science (English Medium) Class 11 - CBSE Question Bank Solutions for Physics

A heavy mass is attached to a thin wire and is whirled in a vertical circle. The wire is most likely to break

When a metal wire elongates by hanging a load on it, the gravitational potential energy is decreased.

Which of the following is a mechanical wave?

By a surface of a liquid we mean

A cork floating in a calm pond executes simple harmonic motion of frequency
\[\nu\] when a wave generated by a boat passes by it. The frequency of the wave is 

An ice cube is suspended in vacuum in a gravity free hall. As the ice melts it

When water droplets merge to form a bigger drop

Air is pushed into a soap bubble of radius r to double its radius. If the surface tension of the soap solution in S, the work done in the process is 

Both the strings, shown in figure, are made of same material and have same cross section. The pulleys are light. The wave speed of a transverse wave in the string AB is
\[\nu_1\]  and in CD it is \[\nu_2\]. Then \[\nu_1 / \nu_2\]

If more air is pushed in a soap bubble, the pressure in it

Two waves represented by \[y = a\sin\left( \omega t - kx \right)\] and \[y = a\cos\left( \omega t - kx \right)\] \[y = a\cos\left( \omega t - kx \right)\] are superposed. The resultant wave will have an amplitude 

If two soap bubbles of different radii are connected by a tube,

Two periodic waves of amplitudes A₁ and A₂ pass thorough a region. If A₁ > A₂, the difference in the maximum and minimum resultant amplitude possible is

The fundamental frequency of a string is proportional to

A wave pulse passing on a string with a speed of 40 cm s⁻¹ in the negative x-direction has its maximum at x = 0 at t = 0. Where will this maximum be located at t = 5 s?

The excess pressure inside a soap bubble is twice the excess pressure inside a second soap bubble. The volume of the first bubble is n times the volume of the second where n is

Which of the following graphs may represent the relation between the capillary rise hand the radius r of the capillary?

Water rises in a vertical capillary tube up to a length of 10 cm. If the tube is inclined at 45°, the length of water risen in the tube will be

following Figure shows a wave pulse at t = 0. The pulse moves to the right with a speed of 10 cm s⁻¹. Sketch the shape of the string at t = 1 s, 2 s and 3 s.

A 20 cm long capillary tube is dipped in water. The water rises up to 8 cm. If the entire arrangement is put in a freely falling elevator, the length of water column in the capillary tube will be