Question: A dual range Crompton’s potentiometer is provided with a dial resistor having 15 steps of 10 Ω each and a slide wire of 10 Ω resistances. The ranges are X1 and X0.1. The current in the potentiometer measuring circuit 10mA on the X1 scale. The slide wire has 100 divisions and one fifth of a scale division can be read with certainty. What is the current drawn from the battery and the resolution of the instrument on X0.1 scale range?
Answer:
MCQ: A dual range Crompton’s potentiometer is provided with a dial resistor having 15 steps of 10 Ω each and a slide wire of 10 Ω resistances. The ranges are X1 and X0.1. The current in the potentiometer measuring circuit 10mA on the X1 scale. The slide wire has 100 divisions and one fifth of a scale division can be read with certainty. What is the current drawn from the battery and the resolution of the instrument on X0.1 scale range?
Correct Answer:
A. 10mA, 20µV
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