Moving Charges and Magnetism - Result Question 70
71. A particle having charge $q$ moves with a velocity $\vec{v}$ through a region in which both an electric field $\vec{E}$ and a magnetic field $\vec{B}$ are present. The force on the particle is
[2002]
(a) $q \vec{E}+q(\vec{B} \times \vec{v})$
(b) $q \vec{E} \cdot(\vec{B} \times \vec{v})$
(c) $q \vec{v}+q(\vec{E} \times \vec{B})$
(d) $q \vec{E}+q(\vec{v} \times \vec{B})$
Show Answer
Answer:
Correct Answer: 71. (d)
Solution:
- (d) Force due to electric field $=q \vec{E}$
Force due to magnetic field $=q(\vec{v} \times \vec{B})$
Net force experienced $=q \vec{E}+q(\vec{v} \times \vec{B})$
