Solve the following problem:
Problem: A 60-Hz ac voltage source has a maximum voltage of 120 V. A student wants to determine the voltage 1/180s after it is zero.
Part I: How many possible voltages are there: (1) one, (2) two, or (3) three? Why?
Part II: Determine all the possible voltages.
I want you to explain the physics in this above problem.