Alternating Current – Solutions
1) A 100Ω resistor is connected to a 220 V, 50 Hz ac supply.
(a) What is the rms value of the current in the circuit?
(b) What is the net power consumed over a full cycle?
Resistance of resistor, R = 100Ω
Root mean square voltage, vrms = 220 volt
Root mean square (rms) value of current, Irms =?
(a) Irms = Vrms/R
= 220/100 = 2.2 A