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A wire of length 10 cm is bent in the form of a circle of radius 2 mm. Calculate equivalent resistance along any two diametrically opposite points if total resistance of wire was 4 ohm
Asked by shailendra.ca1976 | 16 May, 2019, 09:45: PM

The total resistance of 2∏R is 4 Ω.
The two points divide the circle in two semi-circles.
Thus the length of each semi-circle is ∏R.
For equivalent resistance along two diametrically opposite points:

The resistance of ∏R is 2 Ω
The two resistors are in parallel.
Thus,
Equivalent resistance between A and B,

Answered by Shiwani Sawant | 17 May, 2019, 01:08: PM

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