Home
Class 12
PHYSICS
3 A coil of inductance 8.4 mH and resist...

 3 A coil of inductance 8.4 mH and resistance 6 Omega is connected to a 12 V battery The current in the coil is 1.0 A at approximately the time

A

500 s

B

20 s

C

35 ms

D

1 ms

Text Solution

Verified by Experts

The correct Answer is:
D
`I-(V)/( R) (1-e^((RT)/(L)))= (12)/(6) [1-e^((6l)/(8.4xx10^(3)))]=1`
`implies t = 0.97 xx10^(-3)1` milli -sec
Promotional Banner

Similar Questions

Explore conceptually related problems

A coil of inductance 0.50H and resistance 100 Omega is connected to a 240V , 50Hz ac supply. What are the maximum current in the coil and the time lag between voltage maximum and current maximum?

A coil having inductance 2.0 H and resistance 20 Omega is connected to a battery of emf 4.0 V. Find (a) the current a the instant 0.20 s after the connection Is made and (b) the magnetic energy at this instant.

A coil of resistance 10Omega and an inductance 5H is connected to a 100 volt battery. Then energy stored in the coil is

A coil of inductance 0.2 H and 1.0 ohm resistance is connected to a 90 V source. At what rate will the current in the coil grow at the instant the coil is connected to the source?

A coil of inductance L=50muH and resistance = 0.5Omega is connected to a battery of emf=5A. A resistance of 10Omega is connected parallel to the coil. Now at some instant the connection of the battery is switched off. Then the amount of heat generated in the coil after switching off the battery is (0.02)x in mJ. Find valuie of x.

A coil of inductance 1.0 H and resistance 100 Omega is connected to a battery of emf 12 V. Find the energy stored in the magnetic field associated with the coil at an instant 10 ms after the circuit is switched on.

A coil of inductance L=50muH and resistance = 0.5Omega is connected to a battery of emf = 5V. A resistance of 10Omega is connected parallel to the coil. Now, at the same instant the connection of the battery is switched off. Then, the amount of heat generated in the coil after switching off the battery is

A coil of self inductance 10 mH and resistance 0.1 Omega is connected through a switch battery of internal resistance 0.9Omega after the switch is closed, the time taken for the current to attain 80% of the saturation value is [taken ln5=1.6 ]

A coil of inductance 300mh and resistance 2Omega is connected to a source of voltage 2V . The current reaches half of its steady state value in

A solenoid of inductance 50 mH and resistance 10 Omega is connected to a battery of 6V. Find the time elapsed before the current acquires half of its steady - state value.