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प्रश्न
The magnetic potential energy stored in a certain inductor is 15 mJ, when the current in the inductor is 40 mA. This inductor is of inductance ____________.
पर्याय
0.138 H
18.75 H
1.875 H
13.89 H
MCQ
रिकाम्या जागा भरा
उत्तर
The magnetic potential energy stored in a certain inductor is 15 mJ, when the current in the inductor is 40 mA. This inductor is of inductance 18.75 H.
Explanation:
`"Energy stored in inductor," "E" = 1/2"LI"^2`
`therefore "L" = (2"E")/"I"^2`
`= (2 xx 15 xx 10^-3)/((40 xx 10^-3)^2`
`= 18.75 "H"`
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