In a telephone receiver, the size of each of the two poles is 1.2 cm × 0.2 cm, and the flux between each pole and the diaphragm is 3 × 10-6 Wb. The force attracted to the poles will be nearly

In a telephone receiver, the size of each of the two poles is 1.2 cm �

1.	In a telephone receiver, the size of each of the two poles is 1.2 cm × 0.2 cm, and the flux between each pole and the diaphragm is 3 × 10-6 Wb. The force attracted to the poles will be nearly
A.	0.15 N
B.	0.20 N
C.	0.30 N
D.	0.40 N
Answer» B. 0.20 N

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In a telephone receiver, the size of each of the two poles is 1.2 cm × 0.2 cm, and the flux between each pole and the diaphragm is 3 × 10-6 Wb. The force attracted to the poles will be nearly

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