SaraNextGen Study App [2023-24]
Last Updated On 01-06-2023 - By Jeesha Sara

The resistance of the filament of an electric bulb changes with temperature. If an electric bulb rated 220 volt and 100 watt is connected to  sources, then the actual power would be

a)

b)

c)

Between and

d)

Between and


Question ID - 150386 :-

The resistance of the filament of an electric bulb changes with temperature. If an electric bulb rated 220 volt and 100 watt is connected to  sources, then the actual power would be

a)

b)

c)

Between and

d)

Between and

1 Answer
5876 Votes
3537

Answer Key : (d) -

(d)

Here,  (because voltage decreases from

It means heat produced  decreases)

So

Also , Since  [we expect]

So

Hence the actual power would be between  and



Next Question :

Every atom makes one free electron in copper. If 1.1 A Current is flowing in the wire of copper having 1 mm diameter, then the drift velocity(approx.) will be (density of copper= and atomic weight of copper=63)

a)

b)

c)

d)


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