In a potentiometer circuit there is a cell of e.m.f 2V, a resistance of $5 Ω$ and a wire of uniform thickness of length 1000 cm and resistance $15 Ω$ . The potential gradient in the wire is

\frac{1}{500} V / c m

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\frac{3}{2000} V / c m

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\frac{3}{50000} V / c m

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\frac{1}{1000} V / c m

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Solution

The correct option is B $\frac{3}{2000} V / c m$
Potential gradient }=\(\left ( \frac{E}{R+r} \right )\frac{R}{L}\\
=\frac{3}{2000}\frac{V}{cm}\\

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In a potentiometer circuit there is a cell of e.m.f 2V, a resistance of 5Ω and a wire of uniform thickness of length 1000 cm and resistance 15Ω. The potential gradient in the wire is

The correct option is B 32000V/cmPotential gradient }=\(\left ( \frac{E}{R+r} \right )\frac{R}{L}\\ =\frac{3}{2000}\frac{V}{cm}\\

In a potentiometer circuit there is a cell of e.m.f 2V, a resistance of $5 Ω$ and a wire of uniform thickness of length 1000 cm and resistance $15 Ω$ . The potential gradient in the wire is

The correct option is B $\frac{3}{2000} V / c m$
Potential gradient }=\(\left ( \frac{E}{R+r} \right )\frac{R}{L}\\
=\frac{3}{2000}\frac{V}{cm}\\