A centre zero galvanometer is connected in series with a switch and a battery . When the switch is closed and opened periodically (nearly about 4 times/sec) its needleA. reads always zeroB. gives steady readingC. swings backward and forward across zeroD. swings backward and forward from zero about one side .

A centre zero galvanometer is connected in series with a switch and a

1.	A centre zero galvanometer is connected in series with a switch and a battery . When the switch is closed and opened periodically (nearly about 4 times/sec) its needleA. reads always zeroB. gives steady readingC. swings backward and forward across zeroD. swings backward and forward from zero about one side .
Answer» Correct Answer - C `tau_(n)= n IAB` `therefore I = (tau_n)/(n AB)=(18xx10^-5xx10^-2)/(60xx6xx10^-4xx500xx10^-4)` `=10^-3A` .

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