The potentiometer basically consists of a uniform wire of resistance R through which a…
Physics · JEE Advanced · NTA Exams — Current Electricity
The potentiometer basically consists of a uniform wire of resistance R through which a steady current flows when a driver cell source is connected between the points A and B (ends of potentiometer wire) and tapping is adjusted till no current passes through galvanometer. Using this null deflection method, unknown e.m.f. of a cell is determined. Using this concept answer the following questions.
How can sensitivity of this potentiometer be further increased.
- increasing the e.m.f. of driver cell
- increasing the length of potentiometer wire
- decreasing the length of potentiometer wire
- increasing the cross sectional area of wire
Answer
(B) increasing the length of potentiometer wire
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