The electric supply from Kainji Dam is transmitted at high voltages of the order hundreds...

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

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Correct Answer: Option E

Explanation

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