Physics Past Questions and Answers

The energy needed to move a unit positive charge around a complete electric circuit is called the

A force of 5N acts at a point Y on a rod XYZ as shown in this diagram. If XYZ is 2m, what is the moment of the force about point X?

The resistance of a 40W car head lamp, drawing current from a 12V battery is ____.

A beam of light is incident from air to water at an angle of 300. Find the angle of refraction if the refractive index of water is 4/3

An electric heating coil rated at 1Kw is used to heat 2kg of water for 2 minutes. The initial water temperature is 30\(^o\)C. Taking the specific heat of the water as 4,000Jkg \(^{-1}\) and neglecting that of the container, the final water temperature is