PQRS is rectangular cell with PQ perpendicular to the magnetic field as shown above. If a current flows in the the direction PQRS in what direction will the coil move
A
Upwards
B
Downwards
C
TOwards The North Pole
D
Towards The South Pole
Verified Correct Answer: A.
Physical Principles & Numerical Solution
The direction of the force is determined by Fleming's left-hand rule:
Field (Forefinger): N to S (right to left).
Current (Middle finger): P to Q (downwards).
Force (Thumb): When aligning fingers as described, the thumb points upwards.
This force acts on the segment PQ, causing the initial upward movement.
Source: Official Exam / Past Question Archive