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Question

A 0.1 H inductor is connected to a 220 V, 50 Hz ac supply. The rms value of the current in the circuit is

A
7 A
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B
8 A
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C
5 A
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D
72 A
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Solution

The correct option is A 7 A
The inductive impedence is given by,

XL=ωL

XL=100π×0.1

=10π Ω

Irms=VrmsXL=22010π

=⎜ ⎜ ⎜ ⎜22(227)⎟ ⎟ ⎟ ⎟=7 A

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