In an experiment with a potentiometer, V_B=10 V. R is adjusted to be 50 Omega (see figure) . A student wanting to measure voltage E_1 of a battery ( approx. 8V) finds no null point on the last (4th) segment of the potentiometer.Find the resistance of the potentiometer wire and potential drop per unit length across the wire in the second case.

In an experiment with a potentiometer, V_B=10 V. R is adjusted to be 5

1.	In an experiment with a potentiometer, V_B=10 V. R is adjusted to be 50 Omega (see figure) . A student wanting to measure voltage E_1 of a battery ( approx. 8V) finds no null point on the last (4th) segment of the potentiometer.Find the resistance of the potentiometer wire and potential drop per unit length across the wire in the second case.
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