By Team Aakash Byju's | 31st December 2022
150 ohm
350 ohm
625 ohm
25,000 ohm
A
B
C
D
If the bulb is rated as '100 W, 250 V', it means its power rating is 100 Watts and voltage rating is 250 Volts.
P = 100 W V = 250 V
Using the expression for Power, we can write the formula to find the resistance of the bulb as,
P =
V
R
2
,
R =
V
P
2
Substitute the given values to find the resistance of the bulb.
V
P
2
R =
=>
250
100
2
=
625 Ω.