A coil of self inductance 10 mH and resistance...... | EMI

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JEE MAIN 2019

10-04-2019 S2

Question

A coil of self inductance 10 mH and resistance $0.1 \Omega$ is connected through a switch to a battery of internal resistance $0.9 \Omega$. After the switch is closed, the time taken for the current to attain $80 \%$ of the saturation value is: [take $\ln 5=1.6]$

Select the correct option:

A

0.002 s

B

0.324 s

C

0.103 s

D

0.016 s

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

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