| Direction: Q.51 to Q.55 |
| Potentiometer: Potentiometer is a device which is used to find out the emf of any cell and it is also used to find the potential difference across any two points on a conductor correctly. In this device as long wire of manganin or constantan, copper strips, binding screws etc. are used. The principle of potentiometer is given as, the decrease in potential across any part of the wire is directly proportional to the length of that part of wire, provided the current and area of cross-section of the wire remain same. |
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| Read the above passage carefully and give the answer of the following questions: |
A) emf
B) potential difference
C) Both (a) and (b)
D) None of these
Correct Answer: C
Solution :
(c) Both (a) and (b)
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