Electromagnetic Induction - Result Question 30

30. What is the self-inductance of a coil which produces 5V when the current changes from 3 ampere to 2 ampere in one millisecond? [1993]

(a) 5000 henry

(b) 5 milli-henry

(c) 50 henry

(d) 5 henry

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Answer:

Correct Answer: 30. (b)

Solution:

(b) L=edidt=edtdi=5×103(32)H=5mH



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