Question

3. An electric bulb is rated 220 V and 100 W. When it is operated on 110V, the power
consumed will be
(a) 110W (b) 75W (C) 50W (d) 25W​

Answer 1

Answer:

(C) 50W

Explanation:

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Answer 2

Answer:

Electrical Appliances

Explanation:

» P1 = 100 W , V1 = 220 V

Current ( I ) = Power / Voltage = 100 / 220 = 10 / 22 Amperes.

★ Now ; if voltage supply is changed , the current is constant

so ; new power consumed will be :-

Power ( P2 ) = Voltage ( V2 ) × Current ( I )

P2 = 110 × 10 / 22 = 50 Watts .

Option C