Question

To study the dependence of current (I) on potential difference (V) across a resistor R, two students used the two set ups shown in figure A and B respectively. They kept the contact point J in four different positions, marked (i), (ii), (iii) and (iv) in the two figures.

For the two students, the ammeter and voltmeter readings will be maximum when the contact J is in the position:
(A) (iv) in both the set ups
(B) (i) in both the set ups
(C) (iv) in set up A and (i) in set up B
(D) (i) in set up A and (iv)
in set up B

Answer 1

For student A the ammeter reading and the voltmeter reading will be maximum when J is jointed point iv as the sum of the power of the battery will add up.

For Student B the maximum reading of voltmeter and ammeter will be in the case when the J is attached to point i because there would be no interference of any resistors in between and the combined power of battery would be there.

So the correct answer is option (C)

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Answer 2

d is the correct option

(a) in set up A and (d) inset up B