An electric lamp is marked 20W, 220V. it is used for 10hours daily. Calculate (a) Its resistance while glowing (b) no. of units consumed everyday
Answers
Answered by
7
a) We know the Formula for power is P=V^2/ R
putting values we get R= 242 ohm.
b) 1 unit = 1 kwh
Power consumed in 10 hrs. will be P*t i. e. 20W*10= 200wh or 0.2 kwh/unit.
putting values we get R= 242 ohm.
b) 1 unit = 1 kwh
Power consumed in 10 hrs. will be P*t i. e. 20W*10= 200wh or 0.2 kwh/unit.
Answered by
6
hope it helps
pls mark as brainliest
pls mark as brainliest
Attachments:
Similar questions