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Q.

A circular coil of radius 3m is arranged in XY plane with its centre at the origin as shown in figure. If magnetic field strengths at the points P(1,3,2)  and Q(2,2,2)  are BP and BQ respectively (all the coordinates are in m), then BPBQ  is

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answer is 1.

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Detailed Solution

Both the points P and Q are at a distance 2 units from the origin in the XY plane and 2  units distance from the XY plane. Hence magnitudes of B must be same.  B1B2=1

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