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Electricity

Question 3:

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

(a) 100 W

(b) 75 W

(c) 50 W

(d) 25 W

Answer:

(d)Energy consumed by an appliance is given by the expression,

Where,

Power rating, P = 100 W

Voltage,...

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