A long solenoid of radius has

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

A long solenoid of radius

2.0\,\text{cm}

has

1000\,\text{turns m}^{-1}

. The current through it increases uniformly at the rate of

300\,\text{A s}^{-1}

. What is the magnitude of the emf induced in a single circular loop of the same radius placed coaxially inside the solenoid? (a)

4.7\,\text{mV}

(b)

0.15\,\text{mV}

(c)

0.47\,\text{mV}

(d)

0.047\,\text{mV}