At pi/3 radians, what is the amplitude of a sine wave with a peak value of 5 volts?

The amplitude of a sine wave represents the maximum displacement of the wave from its undisturbed position, which is also known as the peak value. In this case, the sine wave has a peak value of 5 volts. The amplitude is defined as the absolute value of the maximum peak, hence for this sine wave, the amplitude is +5 volts.

The amplitude is not dependent on the angle of the sine function evaluated (in this case, at pi/3 radians). Regardless of the phase, the amplitude remains constant at the predefined peak value.

With that context, the correct answer reflects the peak value of the sine wave accurately. The other choices do not represent the appropriate amplitude of the given sine wave; they refer to incorrect values or directions that do not align with the proper definition of amplitude in this scenario.