The figure shows variation of the current through the heating element with time in an iron when it is plugged into a standard 120 V,60 Hz outlet.

-What is the peak voltage?
A)10 V
B)60 V
C)120 V
D)170 V
E)240 V

Question

The figure shows variation of the current through the heating element with time in an iron when it is plugged into a standard 120 V,60 Hz outlet.
 
-What is the peak voltage?
A)10 V 
B)60 V 
C)120 V 
D)170 V 
E)240 V

Quizplus · Accepted Answer

The peak voltage of a standard AC power supply in the United States is approximately 170 V, which corresponds to an RMS voltage of 120 V.

The Figure Shows Variation of the Current Through the Heating