In a series circuit containing a 20 Ω resistor and an unknown inductor
PHYSICS · Single correct · CBSE · Physics · Alternating Current · Alternating Current
Problem
In a series circuit containing a 20 Ω resistor and an unknown inductor, the rms current is 1.2 A at 500 Hz and also 1.2 A at 2000 Hz when a fixed 0.1 µF capacitor is used. The supply voltage is kept constant. Calculate the inductance of the coil.
(a) 0.025H
(b) 2.5H
(c) 0.25H
(d) 0.063H