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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A resistance of 20 ohm is connected to a source of an altermnating potential V = 220 sin ( 100 pie t ). The time taken by the current to change from the peak value to rms value is

A resistance of 20 ohm is connected to a source of an altermnating potential V = 220 sin ( 100 pie t ). The time taken by the current to change from the peak value to rms value is

the voltage and current in the primary are 200 V and 2 A respectively and voltage in secondary is 2000 V. The value of the current in secondary is