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The current in an L - R circuit in a tim...

The current in an L - R circuit in a time t = 2L / R reduces to-

A

`36.5%` of maximum

B

`13.5%` of maximum

C

`0.50%` of maximum

D

`63.2%` of maximum

Text Solution

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The correct Answer is:
b
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MOTION-ELECTRO MAGNETIC INDUCTION-EXERCISE-1
  1. The self inductance and resistance of coil are 5H and 20 Omega respect...

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  2. The growth of current in an L-R circuit in time t=L/r is equal to abou...

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  3. The current in an L - R circuit in a time t = 2L / R reduces to-

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  4. A coil of 10 H inductance has a 5 Omega resistance and is connected to...

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  5. A coil resistance R and inductance L is connected to a battery of emf ...

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  6. Calculate the ratio of power desipatted by the bulb at t=1 sec and t=2...

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  7. Calculated the ratio of current flowing through the battery at t=0 and...

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  8. Plot the variation of emf across the inductor with respect time

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  9. The coefficient of mutual induction between two coils is 4H. If the cu...

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  10. The coefficient of mutual induction between two closely lying coil doe...

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  11. Out of the two coils placed near each other, when a current of 2 amp i...

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  12. An inductor may store energy in

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  13. On making a coil of copper wire of length  and coil radius r, the val...

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  14. v34

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  15. The coefficient of coupling between two coil is maximum when the two c...

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  16. Two coils of self-inductance L(1) and L(2) are placed closed to each o...

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  17. The mutual inductance of an induction coil is 5H . In the primary coil...

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  18. The value of coefficient of mutual induction in two coils can be incre...

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  19. If the current in the primary coil is reduced from 3.0 ampere to zero ...

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  20. A solenoid having a core of cross-section 4cm^(2), half air and half i...

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