An AC source of (rms)

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

Problem

An AC source of

200\,\text{V}

(rms),

50\,\text{Hz}

is applied to a series combination of a resistor and an inductor (coil resistance negligible). The circuit draws

4.0\,\text{A}

(rms) and a wattmeter records

480\,\text{W}

. Determine the inductance of the coil. (a)

0.25\,\text{H}

(b)

0.06\,\text{H}

(c)

0.13\,\text{H}

(d)

0.10\,\text{H}