Question

An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, the power consumed will be. explain​

Answer 1

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• The Power consumed by this bulb across 110 V is 25 Watts.

Answer 2

Answer:

Power, P= RV 2

R= PV 2

R=

100

220×220

=484Ω

The current flow in the circuit,

i=

R

V

′

(V

′

= supplied voltage)

i=

484

110

=0.2272A

The voltage drop across the bulb is 110V

The power consumed by the bulb,

P

b

=

R

V

2

=

484

110×110

P

b

=25W