Physics Past Questions and Answers

A girl stands on a scale in a lift. If the reading on the scale is less than her weight, then the lift is moving

The S.I unit of heat is

A body is pulled through a distance of 500m by a force of 20N. If the power developed is 0.4kW, calculate the time for which the force acts

A metal sheet of area 100cm\(^2\) was heated through 70°C. Calculate its new area if the linear expansivity of the metal is 0.000017K\(^{-1}\).

The thermopile is a device for detecting