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A circular loop has radius R and carries current I2 in a clockwise direction. The center of the loop is a distance D above a long, straight wire. a) What is the direction of the current I1 in the wire if the net magnetic field at the center of the loop is zero? [1 mark] b) Derive an equation for the magnitude of the current I1 [5 marks]

A circular loop has radius R and carries current I2 in a clockwise direction. The center of the loop is a distance D above a long, straight wire. a) What is the direction of the current I1 in the wire if the net magnetic field at the center of the loop is zero? [1 mark] b) Derive an equation for the magnitude of the current I1 [5 marks]

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A circular loop has radius R and carries current I 2 in a clockwise direction. The center of the loop is a distance D above a long, straight wire. a) What is the direction of the current I 1 in the wire if the net magnetic field at the center of the loop is zero? [1 mark] b) Derive an equation for the magnitude of the current I 1 [ 5 marks]

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