Q. 15.0( 1 Vote )

If the rms curren A.

B.

C. 5/6 A

D.

Answer :

Given,
rms current,

Frequency,

Note that at t = 0,
.


Now,




Also,
Angular frequency,


Now, the current can be represented as some cosine or sine function. Let us choose the sine function.
We know that,



where ϕ is a phase constant.


Now, substituting




Hence, we have


Now, at t = 1/300 s,





Hence, the correct answer is (b)

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