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Q.

Two short magnets of magnetic moment 2 Am2 and 5 Am2 are placed along two lines drawn at right angle to each other on the sheet of paper as shown in the figure.What is the magnetic field at the point of intersection of their axis?

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a

2.15 x 10-5 T

b

215 x 10-5 T

c

0.215 x 10-5 T

d

21.5 x 10-5 T

answer is A.

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Detailed Solution

Magnetic field at a point on axial line due to magnet ( 1), B1=μ04π2M1r13∴Magnetic field due to magnet (2), B2=μ04π2M2r23∴Net magnetic field at point P, B=B12+B22=2.15 x 10-5 T
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