Answer:
  V_{max} = 169.7 V
Explanation:
In an alternating voltage system, the value measured by the measurement equipment is the effective voltage, that is, the average voltage over a period
       [tex]V_{rms}[/tex] = [tex]V_{max}[/tex] / √2
in our voltmeter measure a V_{rms} = 120 V
       V_{max} = √2   V_{rms}
       V_{max} = 120 √ 2
       V_{max} = 169.7 V
this is the peak or maximum voltage of the wave
