Home
Class 12
PHYSICS
State the principle of potentiometer....

State the principle of potentiometer.

Text Solution

Verified by Experts

Principle : When a constant current flows through a wire uniform area of cross- section from potential difference between two points an the wire is directly proportiona to length of the wire between the two points `(E=Irl)`
`E alpha l`
Promotional Banner

Similar Questions

Explore conceptually related problems

A. Potentiometer measures the potential difference more accurately than a voltmeter, because the potentiometer a. does not draw current from external circuit. b. has a wire of high resistance. c. draws a heavy current from external circuit. d. has a wire of low resistance. B. With the help of a diagram explain the principle of a potentiometer.

According to the principle of potentiometer, the emf of the cell is:

A potentiometer wire has a length 400 cm and a resistance of 20 Omega . It is connected in series with an external resistance R and a cell of e.m.f. 1.5 V and internal resistance 1 Omega . A source of e.m.f.6 mV is balanced against a length of 30 cm of the potentiometer wire. Find R. According to the principle of potentiometer Vpropl . i.e., V = ilp where l'is the balancing length & p the resistance per cm of the potentiometer wire.

State the principle of moments .