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Q.

If while performing an experiment the pointer/needle of the ammeter and voltmeter do not coincide with the zero marks on the scales then there is:


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a

Zero error

b

No zero error

c

Both 1 and 2

d

None of these 

answer is A.

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Detailed Solution

If the needle/s of the ammeter and voltmeter do not coincide with the zero marks on the scale when performing the experiment, then there is a zero error. To arrive at the final result, the zero error value is subtracted from or added to the observed value depending on the type of zero error.
 
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