AIPMT PRELIMS2005Physics-Electricity
AIPMT PRELIMS 2005 Physics Resistance MCQ Question
Type: MCQ-conceptual-Medium-Class 12
When a wire of uniform cross-section a, length l and resistance R is bent into a complete circle, resistance between two of diametrically opposite points will be:
A
R/4
B
2R
C
4R
D
R/2
Correct Answer
Option A
Detailed Explanation
When the wire is bent into a circle, the resistance between diametrically opposite points is R/4 because the circle is equivalent to two resistors of R/2 in parallel.
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