Question

A wire is sliding as shown in figure. The angle between the acceleration and the velocity of the wire is

• A. ${30}^o$
• B. ${40}^o$
• C. ${120}^o$
• D. ${90}^o$
• E. answer required

Answer 1

The correct option is C ${120}^o$

The current in the wire due to magnetic induction is from bottom to top end of the wire. Hence the force acting on the current carrying wire $\overrightarrow{F}=i(\overrightarrow{l}\times \overrightarrow{B})$ is as shown in the figure. The acceleration has same direction as that of this force. Hence the direction between acceleration and velocity of the wire is ${120}^{\circ }$