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Electric Power

In an electri...

Question

In an electrical circuit three incandescent bulbs A, B and C of rating 40 W, 60 W and 100 W respectively are connected in parallel to an electric source. Which of the following is likely to happen regarding their brightness?

A

Brightness of all the bulbs will be the same.

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B

Brightness of bulb A will be the maximum.

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C

Brightness of bulb B will be more than that of A.

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D

Brightness of bulb C will be less than that of B.

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Solution

The correct option is C Brightness of bulb B will be more than that of A.
More the power rating, more will be the electrical energy consumed by the appliance.
Therefore, energy consumed by bulb C will be the most and by bulb A will be the least.
Therefore brightness of the bulb will be:
Bulb A < Bulb B < Bulb C

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