Which of the following values of an alternating voltage or current represents the real magnitude?
Which of the following values of an alternating voltage or current represents the real magnitude?
Right Answer is:
RMS value
SOLUTION
RMS values of an alternating voltage or current represent the real magnitude.
Root-Mean-Square (RMS) Value:
- The RMS value of an alternating current is given by that steady (DC) current which when flowing through a given circuit for a given time produces the same heat as produced by the alternating current when flowing through the same circuit for the same time.
- It is also known as the effective or virtual value of the alternating current, the former term being used more extensively.
RMS value of the alternating quantity is given as,
VRMS = Vm/√2
IRMS = Im/√2