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What is the energy required to built up a current of lA in an inductor of 20 mH? -

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प्रश्न

What is the energy required to built up a current of lA in an inductor of 20 mH?

संख्यात्मक

उत्तर

`E = 1/2 LI^2`

`E = 1/2 xx 20 xx 10^-3 xx (1)^2`

`1/2 xx 20 xx 10^-3 J =10^-2 J`

E = 10 mJ

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Energy Stored in a Magnetic Field
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