By using the given experimental set-up. How can it be shown that :

Question

(i) By using the given experimental set-up. How can it be shown that :

(a) a force is exerted on the current-carrying conductor AB when it is placed in a magnetic field.

(b) the direction of force can be reversed in two ways.

(ii) When will the magnitude of the force be highest?

(iii) State Fleming’s left hand rule.

Answer 1

(i) (a) The displacement of the rod in the above experimental setup suggests that a force is exerted on the current-carrying conductor AB when it is placed in a magnetic field.

(b) 1) When the direction of current through the conductor is reversed.

2) By changing the direction of field to vertically downwards by interchanging the two poles of the magnet.

(ii) The magnitude of the force is the highest when the direction of current is at right angle to the direction of the magnetic field.

(iii) According to this rule, stretch the thumb, forefinger and middle finger of your left hand such that they are mutually perpendicular as shown in the figure. If the first finger points in the direction of magnetic field and the second finger in the direction of current, then the thumb will point in the direction of motion or the force acting on the conductor.