11 A wire of resistance 12 ohms per meter is bent to form acomplete ci

1.	11 A wire of resistance 12 ohms per meter is bent to form acomplete circle of radius 10 cm. The resistance betweenits two diametrically opposite points, A and B as shownin the figure is(a) 3 Ω(b) 6 2(c) 692(d) 0.60 22cm and 3 cm. Ratio ofIBA
Answer» 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

11 A wire of resistance 12 ohms per meter is bent to form acomplete circle of radius 10 cm. The resistance betweenits two diametrically opposite points, A and B as shownin the figure is(a) 3 Ω(b) 6 2(c) 692(d) 0.60 22cm and 3 cm. Ratio ofIBA

Answer»

EXPLANATION:

Total resistance of wire = 12Ω×2π×10

−1

= 2.4π

Resistance of each half =

2.4π

=1.2π

and as about DIAMETER both parts are in parallel

REQ. =

1.2π

=0.6πΩ

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11 A wire of resistance 12 ohms per meter is bent to form acomplete circle of radius 10 cm. The resistance betweenits two diametrically opposite points, A and B as shownin the figure is(a) 3 Ω(b) 6 2(c) 692(d) 0.60 22cm and 3 cm. Ratio ofIBA​

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11 A wire of resistance 12 ohms per meter is bent to form acomplete circle of radius 10 cm. The resistance betweenits two diametrically opposite points, A and B as shownin the figure is(a) 3 Ω(b) 6 2(c) 692(d) 0.60 22cm and 3 cm. Ratio ofIBA