When the switch is turned ON, what will happen to the bulb?

Bulb will glow continuously

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Bulb will not glow

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Bulb will glow once and then get switched off

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Bulb will blink

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Solution

The correct option is C Bulb will glow once and then get switched off

As we know whenever there is change in magnetic flux current is induced . When a DC current starts flowing in a primary coil then magnetic flux around it changes only at the time of switch ON. As a result, emf is induced in the secondary coil and the bulb will glow.
As DC current remains constant throughout, therefore there is no more change in magnetic flux after that.Hence bulb will get switched off.

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Similar questions

Which bulb will glow when switch is turned on

Question 5

In the circuit shown below, when the switch is moved to ‘ON’ position,

(a) the bulb A will glow first.

(b) the bulb B will glow first.

(d) all bulbs will glow together.

Question 3

Three bulbs A, B, C are connected in a circuit as shown in Figure. When the switch is ‘ON’

(a) bulb C will glow first

(b) bulb B and C will glow simultaneously and bulb A will glow after some time

(d) the bulbs will glow in the order A, B and C

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