Physics Past Questions and Answers

Which of the following characteristics of wave is used in the measurement of the depth of the sea?

What is the frequency of the sound made by a siren having a disc with 32 holes and making 25 revolution per second?

A concave mirror has a radius of curvature of \(36 \mathrm{~cm}\) at what distance from the mirror should an object be placed to give three times the size of the object?

When an ebonite rod is rubbed with fur, it has ____________

The angle between the direction of the earth's magnetic field and the horizontal is called the ____________