Question

2. A lamp is rated at 500 W, 220 v. i) Calculate the current flowing through it.
ii) Determine the resistance of filament in the lamp.​

Answer 1

Answer:

p = 125 Watt

Explanation:

To calculate this, first we need to calculate the resistance of he bulb so,

P = (V^2)/R

500 = (220^2)/R

R = 484/5

R = 96.8 …(i)

so when voltage is 110

P = (110^2)/96.8

P = 121000/968

P =125 Watt

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