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In the circuit shown in figure bulb will...

In the circuit shown in figure bulb will become suddenly bright if :-

A

Key is closed

B

Key is opened

C

Key is opened or closed

D

Would not become bright

Text Solution

Verified by Experts

The correct Answer is:
b
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MOTION-ELECTRO MAGNETIC INDUCTION-EXERCISE-2 (Objective problems (Analytical questions))
  1. If a current of 2A give rise a magnetic flux of 5xx10^(-5) weber/turn ...

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  2. For a solenoid keeping the turn density constant its length makes halv...

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  3. In the circuit shown in figure bulb will become suddenly bright if :-

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  4. Two bulb of same rating B(1) and B(2) are connected in series with the...

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  5. A constant current I is maintained in a solenoid. Which of lthe follo...

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  6. A coil of copper wire is connected in series with a bulb, a battery an...

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  7. The inductance of a solenoid is 5 henery and its resistance id 5 Omega...

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  8. When a certain circuit consistance of a constant emf . E, an inductanc...

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  9. An LR circuit with a battery is connected at t=0. Which of the follow...

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  10. During 0.1 sec. current in a coil increase from 1A to 1.5 A . If induc...

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  11. A closely wound coil of 100 turns and area of cross-section 1cm^(2) ha...

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  12. In the circuit shown in the figure, what is the value of I(1) just aft...

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  13. Pure inductors each of inductance 3 H are connected as shown in figure...

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  14. The time constant of an inductance coil is 2 xx 10^(-3) s. When a 90 O...

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  15. A toroidal solenoid with an air core has an average radius of 15 cm , ...

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  16. A circular iron, core supports N turns . If a current I produces a mag...

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  17. The self inductance of a toroid is :-

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  18. In Fig (a) and (b), two air-cored solenoids P and Q have been shows. T...

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  19. A small square loop of wire of side l is placed inside a large square ...

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  20. A player with 3 meter long iron rod runs toward east with a speed of ...

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