An average induced e.m.f of 2V appers in a coil when the current in it is changed from 10 A in opposite direction in 0.5 sec. The self inductance of t

Question

An average induced e.m.f of 2V appers in a coil when the current in it is changed from 10 A in opposite direction in 0.5 sec. The self inductance of t

An average induced e.m.f of 2V appers in a coil when the current in it is changed from 10 A in opposite direction in 0.5 sec. The self inductance of the coil is
A. 50 mH
B. 60 mH
C. 30 mH
D. 25 mH

Monjur Alahi

6 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - A
`e = L(dI)/(dt) = L((20)/(0.5))=40L`
`:. L = 2/40 = 1/20 = 0.05 H = 50 mH`.

6 views Answered 2023-02-05 15:29