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If the strength of the magnetic field at A is 64 units, the strength of the magnetic field at B is _____.




16 units
32 units
128 units
256 units

If the strength of the magnetic field at A is 64 units the strength of the magnetic field at B is 16 units 32 units 128 units 256 units class=

Respuesta :

the answer is 16 units
Magnetic force obeys an inverse square law with distance. Double the distance, the strength is 1/4 = 64/4 = 16
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