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Figure shows cross section of two large parallel metal sheets carrying electric currents along their surface. The current in each sheet is `10//pi A//m` along the width, Consider two points A and B, as shown in the figure with their positions. A. Megnetic field at A is `4mu T` along x-direction.B. Magnetic field at A is `4 mu T` along negative x-direction.C. Magentic field at B is zero.D. Magnetic field at B is `2 mu T` along x-direction. |
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Answer» Correct Answer - A::C Field due to each plate `=1/2 (mu_0)K=2(mu)K=2(mu)T` At A, field add up, being in the same direction whereas at B, fields cancle out due to opposite directions. |
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