Moving Charges and Magnetism - Result Question 69

70. A very long straight wire carries a current I. At the instant when a charge +Q at point P has velocity v, as shown, the force on the charge is

[2005]

(a) along OY

(b) opposite to OY

(c) along OX

(d) opposite to OX

Show Answer

Answer:

Correct Answer: 70. (a)

Solution:

  1. (a) The direction of B is along (k^)

The magnetic force

F=Q(v×B)=Q(vi^)×B(k^)=QvBj^

F is along OY.



NCERT Chapter Video Solution

Dual Pane