Physics
Grade-10
Easy
Question
The side of the rectangular coil will experience a maximum force when the current is ____.
- Perpendicular to the magnetic field
- Parallel to the magnetic field
- Antiparallel to the magnetic field
- Zero
Hint:
Perpendicular to the magnetic field
The correct answer is: Perpendicular to the magnetic field
Torque = M × B
= niAB sin ø
So, sin ø is maximum when ø = 90° and ø is normal between normal of plane of coil and field.
So, the normal to the plane of the coil should be perpendicular to the field to produce maximum torque.
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