A wire of resistance 10 ohm is bent in the form of circle. what is the effective resistance between the two points at the ends of any diameter of the circle.
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resistance is proportional to the length of the wire L
when the wire is bent to form circle the upper half & lower half of the wire has length L/2 so resistance of the upper half & lower half of the wire = 10/2 = 5Ω
so when connected in the given manner the effective resistance of the wire will b as if 2 wires of resistance 5Ω r in parallel
so effective resistance of the wire will b 5/2 = 2.5 Ω
when the wire is bent to form circle the upper half & lower half of the wire has length L/2 so resistance of the upper half & lower half of the wire = 10/2 = 5Ω
so when connected in the given manner the effective resistance of the wire will b as if 2 wires of resistance 5Ω r in parallel
so effective resistance of the wire will b 5/2 = 2.5 Ω
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