A wire of resistance 12 ohms per meter is bent to form a complete circle of radius 10 cm. Theresistance between its two diametrically opposite points, A and B as shown in the figure, is :(A) 60(B) 0.60(C)302(D) 602
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Explanation:
Total resistance of wire = 12Ω×2π×10
−1
= 2.4π
Resistance of each half = 2
2.4π
=1.2π
and as about diameter both parts are in parallel
Req. =
2
1.2π
=0.6πΩ
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