Physics Past Questions and Answers

A source of sounds produces waves in air of wavelength1.65m. If the speed of sound in air is 330ms-1 the period of vibration in seconds is

Which of the following statement s is/are not correct about a standing wave? I. It is formed by the superimposition of two progressive waves traveling in the same direction II. All points on the wave are vibrating with maximum displacement III. It is formed by the superimposition of two progressive waves of different amplitudes traveling in opposite directions

A boy standing a distance from the foot of a tall cliff claps his hands and hears an echo 0.5s later. If the speed of sound is 340ms1, how far is he from the cliff?

A sounding tuning fork is brought near the end of a pipe containing an air column and the loudness of the sound increases. This effect is due to

If the leaves a positively charged electroscope collapse completely as an object is brought near the cap of the electroscope, the objects possesses