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A coll has an inductance of (2.2)/(pi)H ...

A coll has an inductance of `(2.2)/(pi)H` and is joined m series with a resistance of `220Omega`. When an alternating e.m.f. of 220 V at 50 c.p.s. is applied to it, then the wattless component of the runs current in the circuit is

A

5 ampere

B

`0.5` ampere

C

`0.7` ampere

D

7 ampere

Text Solution

Verified by Experts

Wattless current `= 1 _(rms) sin phi`
where `tan = (omega L )/(R)= (2pi fL)/(R)`
and `I _(rms) = (V _(rsm))/( z) = ( v _(rms))/( sqrt ( R ^(2) + (omega L ) ^(2)))`
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