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JAMB Physics 1988 Question 44

Question 44

Electrical Energy and Power

Which of the following instruments consumes the highest current? (A. Electric iron: 250 V, 1 kW; B. Television set: 220 V, 110 W; C. Torchlight: 6 V, 30 W; D. Immersion heater: 110 V, 500 W)

  1. A.Electric iron
  2. B.Television set
  3. C.Torchlight
  4. D.Immersion heater
Show the answer and explanation

Answer: C (Torchlight)

Explanation

I = P/V: iron 4 A, television 0.5 A, torch 5 A, heater 4.55 A. The torchlight draws the most.