Question

what would you suggest to a student if while performing an experiment he finds that the pointer of ammeter and voltmeter do not coincide with the zero marks on the scale when circuits open no extra ammeter is available in the laboratory​

Answer 1

To subtract the value of reading shown by ammeter from the value he gets after passing the current

Answer 2

I would like to suggest to subtract the value of the reading shown by the ammeter from the value he views after passing the current to the student who is performing an experiment where he finds that the pointer of ammeter and voltmeter do not coincide with the zero marks on the scale when circuits open no extra ammeter is available in the laboratory.