If an ideal battery of e.m.f. 10 V is connected with external resistance 9 Ω and a wire of length 10 m and resistance 1 Ω in series as shown in figure, then calculate potential gradient for potentiometer wire

Question

If an ideal battery of e.m.f. 10 V is connected with external resistance 9 Ω and a wire of length 10 m and resistance 1 Ω in series as shown in figure, then calculate potential gradient for potentiometer wire, 1 V / m, 0.1 V / m, 0.01 V / m, 10 V / m

MARKS App · Accepted Answer

Current through potentiometer wire, i = 10 9 + 1 = 1 A ∴ The potential drop across potentiometer wire, V = i R = 1 × 1 = 1 V ∴ Potential gradient, ϕ = V l = 1 10 = 0.1 V / m

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