Two concentric coils have a mutual inductance of

PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

150\,\text{mH}

. The current in the primary varies with time as

I_p(t)=10\sin(100\pi t)\,\text{A}

, where

t

is in seconds. (a) Write the expression for the instantaneous emf induced in the secondary. (b) Determine the magnitude of the induced emf at

t=2.0\,\text{ms}

. (c) Calculate the rms value of the emf in the secondary.