For a direct current, the rms current is ________ the mean current.
(a) Greater than
(b) Less than
(c) Equal to
(d) Not related to
This question was posed to me in final exam.
This key question is from Average and RMS Values of Sinusoidal & Non-Sinusoidal Currents and Voltages in section Alternating Voltage and Current of Basic Electrical Engineering