electric power

mcqspedia.com has 5 Question/Answers about Topic electric power

Grid cables are 15 km long with a resistance of 0.20 Ω km-1, powers wasted as heat in these cables are

Grid cables are 15 km long with a resistance of 0.20 Ω km-1, powers wasted as heat in these cables are
  • A. 50 kW
  • B. 60 kW
  • C. 20 kW
  • D. 30 kW
  • Correct Answer: Option D

Current in a 60 W light bulb when it is connected to a 230 V power supply is

Current in a 60 W light bulb when it is connected to a 230 V power supply is
  • A. 0.26 A
  • B. 1.5 A
  • C. 2.6 A
  • D. 3.9 A
  • Correct Answer: Option A

To protect wiring from excessive passing of current is

To protect wiring from excessive passing of current is
  • A. voltmeter
  • B. fuse
  • C. galvanometer
  • D. resistance
  • Correct Answer: Option B

Generators at a power station produce electric power at voltage

Generators at a power station produce electric power at voltage
  • A. 45 kW
  • B. 50 kW
  • C. 60 kW
  • D. 25 kW
  • Correct Answer: Option D

Electric power is related to

Electric power is related to
  • A. current in component
  • B. potential difference
  • C. electrical resistance
  • D. both A and B
  • Correct Answer: Option D