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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.

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ANSWER AND EXPLANATION:

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                                                 INFORMATION

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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

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                                                    ANSWER

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                              So, the answer will be may be zero.

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