Question

The RMS value of AC is defined as:

Options

• The maximum instantaneous current value in one cycle

• The difference between the maximum and minimum current values in one cycle

• The square root of the mean of the squares of the instantaneous current values over one cycle

• The arithmetic mean of the instantaneous current values over one cycle

Answer 1

The RMS (root mean square) value of AC is defined as the square root of the mean of the squares of the instantaneous current values over one cycle. This value is used for practical measurement of alternating current.