Physics · Kirchhoff's laws and their applications, Wheatstone bridge, Metre Bridge
Assertion The wire of a potentiometer should be of uniform area of cross section
Assertion The wire of a potentiometer should be of uniform area of cross section. Reason It satisfies the requirement of the principle of the potentiometer.
- A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
- B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
- C. Assertion is correct but Reason is incorrect
- D. Assertion is incorrect but Reason is correct
Step-by-step solution
In a potentiometer, a uniform cross-sectional area ensures a constant resistance per unit length, leading to a uniform potential gradient. This directly satisfies the principle that the potential difference across any portion of the wire is proportional to its length, making the reason the correct explanation for the assertion.
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