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A solenoid has an inductance of 10 henty...

A solenoid has an inductance of 10 henty and a resistance of 2 ohm. It is connected to a 10 volt battery. How long will it take for the magnetic energy to reach `1//4` of its maximum value?

A

3.5 sec

B

2.5 sec

C

5.5 sec

D

7.5 sec

Text Solution

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The correct Answer is:
a
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MOTION-ELECTRO MAGNETIC INDUCTION-EXERCISE-2 (Objective problems (Analytical questions))
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  2. Which of the following can produce maximum induced emf?

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  3. A solenoid has an inductance of 10 henty and a resistance of 2 ohm. It...

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  4. An inductance coil have the time constant 4 sec, if it is cut into two...

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  5. Which statement is correct from following (a) Inductor store ener...

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  6. Two coils are made of copper wires of same length in the first coil t...

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  7. If a current of 2A give rise a magnetic flux of 5xx10^(-5) weber/turn ...

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

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

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

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

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

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

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

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

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

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

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

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

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

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