# How much will be the power of a 220V, 100W electric bulb working at 110V ? (a) 100W, (b) 75W, (c) 50W, (d) 25W.

## Answers

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2

**Explanation:**

Input power = ( working voltage)²/R

= ( 220 x 220 )/ R

R = 48400/ 100 = 484 ohm

now ,

power =( 110 x110)/ 484 = (110 x 110 )/ (22 x 22)

= 100/4 = 25W

Answered by

0

Hey there !

Your answer is : 25 W

• Please refer to the attachment below for step by step explanation!

#Hope it helps!

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