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Q.

A 10m long wire of resistance 15 ohm is connected in series with a battery of emf 2V (no internal resistance) and a resistance of 5 ohm. The potential gradient along the wire is

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a

0.15 Vm-1

b

1.5Vm-1

c

0.45V m-1

d

4.5Vm-1

answer is A.

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Detailed Solution

Potential gradient =Er+R+RS×RLP
=20+15+5×1510=0.15

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A 10m long wire of resistance 15 ohm is connected in series with a battery of emf 2V (no internal resistance) and a resistance of 5 ohm. The potential gradient along the wire is