Physics, 28.07.2020 15:01 chasechevy13

The wire of the potentiometer has resistance 4 ohms and length 1 m. It is connected to a cell of e. m.f. 2 volts and internal resistance 1 ohm. If a cell of e. m.f. 1.2 volts is balanced by it, the balancing length will be:
A) 90 cm
B) 60 cm
C) 50 cm
D) 75 cm

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The wire of the potentiometer has resistance 4 ohms and length 1 m. It is connected to a cell of e....