Two potentiometers A and B having 4 wires and 10 wires, each having 100 cm in length are used to compare e.m.f. of 2 cells. Which one will give a larger balancing length?
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a
Balancing length doesn't depend on the total length of the wire.
b
Both A and B will give same balancing length
c
Potentiometer B
d
Potentiometer A
answer is C.
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Detailed Solution
Larger the length, lesser will be the potential gradient, so more balancing length will be required.