Question

the power delivered by a magnetic field, on a moving charge particle is
1) zero because magnetic force Fm acts parallel to v
2) positive because magnetic force Fm acts parallel to v
3) negative because magnetic force Fm acts opposite to v
4) zero because magnetic force Fm acts perpendicular to v​

Answer 1

Answer:

option 3 is the correct ✅answer of this question

Answer 2

The power delivered by a magnetic field, on a moving charged particle is zero because magnetic force F acts perpendicular to v​. (Option 4)

• The magnetism between two moving charged particles is often defined because of the influence of one charge's magnetic flux on the opposite.
• ∴ F = q (v × B)

                     where, F = magnetic force

                                 q = charge

                                 v = velocity

                                 B = magnetic field

• A magnetic field's power is the dot product of magnetic force (F) and velocity (v).

          ∴ Power = F. v

• But, the magnetism is usually perpendicular to the speed. Thus, the power delivered by a magnetic flux on a moving charged particle is usually zero.