A resistor is connected in series with an unknown element to a sinusoidal AC source
PHYSICS · Single correct · CBSE · Physics · Alternating Current · Alternating Current
Problem
A resistor is connected in series with an unknown element to a sinusoidal AC source. An oscilloscope shows that the current leads the supply voltage by 25∘. Which of the following is the most likely nature of the unknown element?
(a) A pure inductor
(b) A filament lamp whose resistance increases with temperature
(c) A pure capacitor
(d) Another resistor of larger value