Question

a battery of 10 cells each of emf E=1.5v and internal resistance 0.5ohm, has one cell wrongly connected.it is being charged by 220v power supply with an external resistance of 47 ohm in series.the potential difference across the battery

Answer 1

Hello Dear,

◆ Answer -

V = 32 V

◆ Explanation -

Total EMF of all cells is -

E = 1.5×9 - 1.5

E = 12 V

Current flowing through the conductor is -

I = (220 + 10×1.5) / 47

I = 235 / 47

I = 5 A

Resistance of battery is -

r = 0.5 × 9 - 0.5

r = 4 ohm

So now, potential difference across the battery is -

V = E + Ir

V = 12 + 5×4

V = 32 V

Hence, potential difference across the battery is 32 V.

Hope this helps you..