Question 36
Electromagnetic InductionThe 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
Show the answer and explanation
Answer: E (transformers)
Explanation
Alternating voltages are stepped down from transmission levels to 220 V by step-down transformers.