An electric bulb is rated 220 V, 11W. The resistance of its filament when it glows with a power supply of 220 V is :

An electric bulb is rated 220 V; 11W. The resistance of its filament when it glows with a power supply of 220 V is:
(a) 4400 Ω
(b) 440 Ω
(c) 400 Ω
(d) 20 Ω

Correct Answer : Option (a) 4400 Ω

More Questions : A piece of wire of resistance ‘R’ is cut lengthwise into three identical parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R’, then the value of R/R’ is:

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