Question

When a charged particle moving with velocity is subjected to a magnetic field of induction $\rightarrow$ B , the force on it is non-zero. This implies that :

• A. Angle between $\rightarrow$ B and $\rightarrow$ V is necessarily 90°
• B. Angle between $\rightarrow$ B and $\rightarrow$ V can have any value other than 90°
• C. Angle between $\rightarrow$ B and $\rightarrow$ V can have any value other than Zero and 180°
• D. Angle between $\rightarrow$ B and $\rightarrow$ V is either Zero 180°

Answer 1

Answer: (C)

Angle between $\rightarrow$ B and $\rightarrow$ V can have any value other than Zero and 180°

Answer 2

Force on a charged particle moving in a magnetic field is F = q(vB)
So, if v and B are at an angle, F
= qvBsin$\theta$
= 0, sin = 0 = 0,180.

Therefore, the correct option is (C): Angle between $\rightarrow$ B and $\rightarrow$ V can have any value other than Zero and 180°