MCQ
A magnetic field exerts no force on :
- AAn electrical charge moving perpendicular to its direction...
- BAn unmagnetised iron bar.
- ✓A stationary electric charge.
- DA magnet.
✓
Answer
Correct option: C.
A stationary electric charge.
Magnetic force is given by Lorentz equation as :
$F = q(v \times B)$
Here $, q =$ amount of electric charge $, v =$ velocity of charge and $B =$ magnetic flux
Thus, when velocity of charge $(v) = 0,$ magnetic force $(F) = 0$
$F = q(v \times B)$
Here $, q =$ amount of electric charge $, v =$ velocity of charge and $B =$ magnetic flux
Thus, when velocity of charge $(v) = 0,$ magnetic force $(F) = 0$
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