Physics Alternating Current PMC 2021
PMDC Verified Question 81 of 127

If the peak voltage of an AC signal is \( 9\text{ V} \), the corresponding peak-to-peak voltage of the waveform is:
A
9 V
B
18 V
C
4.5 V
D
0 V
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: 18 V
Concept:

This covers the conversion between peak voltage (amplitude) and peak-to-peak voltage for a symmetric alternating wave.

Formula:

$$V_{p-p} = 2 V_p$$

Solution:

Given \( V_p = 9\text{ V} \):

$$V_{p-p} = 2 \times 9\text{ V} = 18\text{ V}$$

Why other options are incorrect:

  • 4.5 V is the result of dividing by 2 instead of multiplying.


  • 9 V is simply the peak amplitude.

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