Physics Past Questions and Answers

A radio station broadcasts at a frequency of 400KHz. If the speed of the wave is 3.0 ×10-8 ms-1, calculate the wavelength of the radio wave.

Which of the following is/are longitudinal wave(s)?

I. Light waves from the sun
II. Sound waves in the air
III. Waves on a vibrating string

Which of the following radiations has the shortest wavelength?

Which of the following statements is/are correct? Sound waves travel through

I. air
II. vacuum
III.Water

An electric motor primary converts