एक शुद्ध रूप से प्रेरणिक (purely inductive) प्रत्यावर्ती धारा (AC) परिपथ में, विद्युत धारा वोल्टेज से कितने फेज कोण (phase angle) पीछे रहती है?

An alternating voltage source of variable angular frequency ω and fixed amplitude V is connected in series with a capacitance C and an electric bulb of resistance R (zero inductance). When ω is increased, what happens to the brightness of the bulb?

An inductor of reactance 1 Ω and a resistor of 2 Ω are connected in series to the terminals of a 6 V (rms) AC source. The power dissipated in the circuit is: