Question

Q4.We know a current carrying conductor placed in a magnetic field experiences a force due to which the conductor moves. How do we think the rod displaces if - (a) current in rod is increased (b) a strong horse shoe is inserted (c) length of the rod is increased.

Answer 1

The force depends on three factors i.e length of conductor, strength of magnetic field nd current in the conductor nd all force is directly proportional to all the above factors therefore increasing one will increase the force
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Answer 2

The rod displaces in the following way when placed in a magnetic field:

• The value of the force on a current-carrying conductor placed in a magnetic field is given by, F = BiL.
• Here B is the Magnetic Field, i is the current flowing through the conductor and L is the effective length of the conductor. All three should be mutually perpendicular to one another.

(a) On increasing current, the force on the rod increases given that F ∝ i. Hence, the displacement of the rod will increase.

(b) On inserting a strong horseshoe magnet, the force increases given that F ∝ B. Hence, the displacement of the rod increases.

(c) On increasing the length, the force on the rod increases (F ∝ L). Hence, the displacement of the rod increases.