SSC JE Electrical Engineering 2017 Set 2 Paper

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Question : 107 of 200

Marks: +1, -0

Figure lamp shown in the picture is switched on. From the moment of switching on, how long does it take for the lamp to glow ?

3 seconds because the electric current travels at the velocity of sound /3
about 1 second
about 0.1 second
the time, practically, is zero because the velocity of the propagation of electric current is almost that of light

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