Answer:
Option A. 10 degrees
Explanation:
When a charged particle is placed magnetic field, it will possess magnetic force. The force acting on the particle is given by :
[tex]F=ilB\sin\theta[/tex]
i and l are current and length of wire
Here,
[tex]\theta[/tex] is the angle between velocity and magnetic field.
The force is minimum when the value of [tex]\sin\theta[/tex] is minimum.
[tex]\sin(10)=0.17\\\\\sin(30)=0.5\\\\\sin(45)=0.707\\\\\sin(90)=1[/tex]
It is clear that the value of sin(10) is minimum out of all other angles. So, the force on a current-carrying wire is minimum when the current is moving at what angle of 10 degrees to the magnetic field
