Question

The following precautions were listed in the experiment on study of "Dependence of current on potential difference":-
A.use copper wires as thin as possible for making connections
B.all the connections should be kept tight
C.the +ve and -ve terminals of voltmeter and ammeter should be correctly connected
D.The key in the circuit,once plugged in,should not be taken out till all the observations have been completed

Which of these precautions are to be corrected?Why?

Answer 1

D is correct
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