Question

Which one of the following is correct statement about magnetic forces?

• A. Magnetic forces always obey Newton?? third law
• B. Magnetic forces do not obey Newton?? third law
• C. For very high current, magnetic forces obey Newton?? third law
• D. Inside low magnetic field, magnetic forces obey Newton?? third law

Answer 1

Answer: (B)

Magnetic forces do not obey Newton?? third law

Answer 2

As the action and reaction are instantaneous in $III^{rd}$ law But magnetic forces transmit with finite speed $c$