An ac source is rated 220 v, 50 hz. the average voltage is calculated in a time interval of o.01 s. it (a) must be zero (c) is never zero (b) may be zero (d) is (220w2)v.

ANSWER AND EXPLANATION:

                                                 INFORMATION

Frequency - 50Hz. Which means that the time period of the wave if 1/50 = 0.02 sec. Here we are going to check the average voltage for the time interval of 0.01sec. If the interval lies between π/2 to 3π/2. the average voltage will be zero. In all the other cases it will not be zero

                                                    ANSWER

                              So, the answer will be may be zero.

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