A calibrated potentiometer is used to measure the e.m.f. of a cell because the
A
internal resistance of a cell is small compared with that of the potentiometer
B
potentiometer has a linear scale
C
potentiometer takes no current from the cell
D
resistance of the potentiometer is less than that of a voltmeter
Verified Correct Answer: C.
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #28358)