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When does a bulb glow ?...

When does a bulb glow ?

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The filament of a bulb glows when current flows through it but the wires connected to it do not. Explain.

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B_1,B_2 and B_3 are three identical bulbs connected as shown in figure. When all the three bulbs glow, a current of 3A is recorded by the ammeter A. What happens to the glow of the other two bulbs when the bulb B_1 gets fused?

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In the circuit shown in fig. 14.25- Would any of the bulb glow when the switch is in the 'OFF' position?

B_1,B_2 and B_3 are three identical bulbs connected as shown in figure. When all the three bulbs glow, a current of 3A is recorded by the ammeter A. What happens to the reading of A_1,A_2,A_3 and A when the bulb B_2 gets fused?

The filament of an electric bulb draws a current of 0.4 ampere.Calculate the amount of charge flowing through the filament if the bulb glows for 2 hours.Also calculate the number of electrons passed.

A bulb is connected in alternating current circuit.The frequency of a.c. is 50 Hz. Clearly current becomes zero 100 times in one second, then why does the bulb not lit intermittently? If the frequency of a.c. be 2 Hz, then will the bulb lit intermittently?