Click to Chat
1800-1023-196
+91-120-4616500
CART 0
Use Coupon: CART20 and get 20% off on all online Study Material
Welcome User
OR
LOGIN
Complete Your Registration (Step 2 of 2 )
How we can select the resistance of the driver cell and length of the wire for a potentiometer?
Potentiometer is a device used to measure the internal resistance of a cell, to compare the e.m.f. of two cells and potential difference across a resistor. It consists of a long wire of uniform cross sectional area and of 10 m in length. The material of wire should have a high resistivity and low temperature coefficient. The wires are stretched parallel to each other on a wooden board. The wires are joined in series by using thick copper strips.Potential gradient is given by,( σ = V / L )As length of the wire (L) is more, small will be the magnitude of σ and we have more accuracy in measurement of potential difference with the help of potentiometer
Post Question
Dear , Preparing for entrance exams? Register yourself for the free demo class from askiitians.
points won -