Which one of the following is correct statement about magnetic forces?
A
Magnetic forces always obey Newton's third law
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B
Magnetic forces do not obey Newton's third law
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C
For very high current, magnetic forces obey Newton's third law
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D
Inside low magnetic field, magnetic obey Newton's third law
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Solution
The correct option is B Magnetic forces do not obey Newton's third law As the action and reaction are instantaneous in IIIrd law But magnetic forces transmit with finite speed c.