A long straight conductor, carrying a current i, is bent to form an al

1.	A long straight conductor, carrying a current i, is bent to form an almost complete circular loop of radius r on it. The magnetic field at the centre of the loop(a) is directed into the paper (b) is directed out of the paper(c) has magnitude μ0i/2r (1 + 1/π)(d) has magnitude μ0i/2r (1 + 1/π)
Answer» Correct Answer is:(b) is directed out of the paper, (c) has magnitude μ₀i/2r (1 + 1/π) The field at the centre of the loop due to the straight part is μ₀i/(2πr), directed into the paper, and the field due to the loop is μ₀i/(2r), directed out of the paper.

A long straight conductor, carrying a current i, is bent to form an almost complete circular loop of radius r on it. The magnetic field at the centre of the loop(a) is directed into the paper (b) is directed out of the paper(c) has magnitude μ0i/2r (1 + 1/π)(d) has magnitude μ0i/2r (1 + 1/π)

Answer»

Correct Answer is:(b) is directed out of the paper, (c) has magnitude μ₀i/2r (1 + 1/π)

The field at the centre of the loop due to the straight part is μ₀i/(2πr), directed into the paper, and the field due to the loop is μ₀i/(2r), directed out of the paper.

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A long straight conductor, carrying a current i, is bent to form an almost complete circular loop of radius r on it. The magnetic field at the centre of the loop(a) is directed into the paper (b) is directed out of the paper(c) has magnitude μ0i/2r (1 + 1/π)(d) has magnitude μ0i/2r (1 + 1/π)

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