When a DC voltage is applied to an inductor, the current through it is found to build up in accordance with I = 20(1-e-50t). After the lapse of 0.02 s, the voltage is equal to 2 V. What is the value of inductance?

When a DC voltage is applied to an inductor, the current through it is

1.	When a DC voltage is applied to an inductor, the current through it is found to build up in accordance with I = 20(1-e-50t). After the lapse of 0.02 s, the voltage is equal to 2 V. What is the value of inductance?
A.	2 mH
B.	5.43 mH
C.	1.54 mH
D.	0.74 mH
Answer» C. 1.54 mH

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When a DC voltage is applied to an inductor, the current through it is found to build up in accordance with I = 20(1-e-50t). After the lapse of 0.02 s, the voltage is equal to 2 V. What is the value of inductance?

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