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Jamb Physics Past question

The electric supply from Kainji Dam is transmitted at high voltages of the order hundreds of kilovolts but is converted to domestic use of about 220 volts by

Jamb 1978 The electric supply from Kainji Dam is transmitted at high voltages of the order hundreds of kilovolts but is converted to domestic use of about 220 volts by A. commutators B. transistors C. valves and diodes D. rectifiers E. transformers  ANSWER: Option E EXPLANATION: A transformer is a […]

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Jamb Physics Past question

A few grains of table salt were put in a cup of cold water, kept at a constant temperature and left undisturbed. Eventually all the water tasted salty. This action is due to 

Jamb 1978 A few grains of table salt were put in a cup of cold water, kept at a constant temperature and left undisturbed. Eventually all the water tasted salty. This action is due to  A. Convection B. Osmosis C. Capillarity D. diffusion E. Conductivity ANSWER: Option  D EXPLANATION:  I […]