A 10  m long wire of resistance 20 Ω is connected in series with a battery of emf 3  V and a resi...

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A 10  m long wire of resistance 20 Ω is connected in series with a battery of emf 3  V and a resistance of 10 Ω. The potential gradient along the wire (in V / m ) is:
a. 0.02
b. 0.1
c. 0.2
d. 1.2

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