Question

A `200Omega` resistor is connected to a 220 V, 50 Hz AC supply. Calculate rms value of current in the circuit. Also find phase difference between voltage and the current.

Answer 1

Given, `V_(rms) = 220V`, f = 50Hz, R= `200Omega`
Current in the purely resistive AC circuit `I=V/R`
`therefore` rms value of current
`I_(rms) = (V_(rms)/R) = 220/200 = 1.1`A
In purely resistive AC circuit, current and voltage are in phase. Therefore phase difference is zero.