The emf of the driving cell used in the main circuit of the potentiometer should be more than the potential differnce to be measured. Why?
Text Solution
Verified by Experts
If it is not so, then the balance point will not be obtained on the potentiometer wire.
Topper's Solved these Questions
CURRENT ELECTRICITY
PRADEEP|Exercise Conceptual Problems|3 Videos
CURRENT ELECTRICITY
PRADEEP|Exercise Very short Q/A|7 Videos
COMMUNICATION SYSTEMS
PRADEEP|Exercise MODEL TEST PAPER-2|9 Videos
DUAL NATURE OF RADIATION AND MATTER
PRADEEP|Exercise Exercise|191 Videos
Similar Questions
Explore conceptually related problems
The emf of the driver cell in the potentiometer experiment should be greater than the emf of the cell to be determined. Why?
Potentiometer is better for measuring the potential difference than the voltmeter because
Assertion : The e.m.f. of the drivercell in the potentiometer experiment should be greater than the e.m.f. of the cell to determined.
Potentiometer measures the potential difference more accurately than a voltmeter, because
A resistance R is connected across a cell of emf epsilon and internal resistance r. A potentiometer now measures the potential difference between the terminals of the cell is V. Write the expression for r in terms of epsilon , V and R .
Assertion: The emf of the cell in secondary circuit must be less than emf of cell in primary circuit in potentiometer. Reason: Balancing length cannot be more than length of potentiometer wire.
PRADEEP-CURRENT ELECTRICITY-Problems for Practice (B)
