Physics Past Questions and Answers

Five 80-W and three 100W are run for 8 hours. If the cost of energy is N5.00 per unit, calculate the cost of running the lamp. [1 unit = 1 kWh]

Which of the following electromagnetic wave can be detected by its heating effect?

If a gas is excited by high voltage to produce a discharge and the light is examined in a spectrometer

The number of protons in an element increased by one after a radioactive decay. The element must have decay by emitting

In a nuclear reactor, chain reactions result from the release of