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JAMB Physics 1993 Question 44

Question 44

Electromagnetic Induction

The primary aim in high tension transmission is to

  1. A.minimize electrical energy losses due to heat production
  2. B.increase the rate of energy transfer by using high voltage
  3. C.increase the current in the wires
  4. D.generate electricity at high current and low voltage.
Show the answer and explanation

Answer: A (minimize electrical energy losses due to heat production)

Explanation

At high voltage the same power is sent with a small current, so the I2R heat lost in the cables is small.