Question

An AC source has a maximum output

potential difference of 220 V. What is the
effective (rms) potential difference across the
source?
a. 110 V
b.
150 V
C.
160 V
d. 310 V

Answer 1

b. 150 V

Step-by-step explanation:

The effective (root mean square, or rms) potential difference (VrmsVrms​) for an AC source with a maximum potential difference (VmaxVmax​) can be calculated using the formula:Vrms=Vmax2Vrms​=2​Vmax​​Given that the maximum potential difference (VmaxVmax​) is 220 V, we can substitute this value into the formula:Vrms=220 V2≈155.56 VVrms​=2​220V​≈155.56VTherefore, the effective (rms) potential difference across the source is approximately 155.56 V.So, the closest answer from the given options is:

b. 150 V