Physics Past Questions and Answers

An object is placed 20cm from a concave mirror of focal length 15cm. Calculate the linear magnification of the image formed

All electromagnetic waves in a vacuum have the same

The diagram given illustrates two charged particles W and X. The charges on W and x are respectively

An alternating current supply is connected to an electric lamp which lights with the same brightness as it does with direct current source emf 6v. The peak potential difference of the a.c supply is

An electric generator rated 12 kW, 2 kV distribute power through a cable of resistance 20\(\Omega\). Calculate the power loss in the cable.