1.

The potential difference between the points a and b in given figure will be:(a) R1 – R2(b) R2 – R1(c) \(\frac{R_{1} R_{2}}{R_{1}+R_{2}}\)(d) Zero

Answer»

(a) R1 – R2
I1 = I 2 = 1 amp
∴ Potential at a, Va = I1 × R1
= 1 × R1 = R1
Potential at b, Vb = I2R2 = 1 × R2 = R2
Va – Vb = R1 – R2


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