Match List - I with List - II.
| List – I | List – II | ||
|---|---|---|---|
| (A) | Direction of induced current in a conductor moving in a magnetic field. | (I) | Ampere's swimming rule |
| (B) | Direction of the magnetic field due to a current carrying long wire | (II) | Fleming's left hand rule |
| (C) | Force experienced by a moving charged particle in the magnetic field | (III) | Fleming's right hand rule |
| (D) | Direction of deflection of magnetic needle due to current in the wire | (IV) | Right hand rule |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A)-(III), (B)-(IV), (C)-(II), (D)-(I)
Each rule fixes the direction of one effect of currents and magnetic fields.
(A) Direction of induced current in a conductor moving in a magnetic field — this matches (III) Fleming’s right hand rule. It is the rule for motional induced current (thumb: motion, forefinger: field, middle finger: current).
(B) Direction of the magnetic field due to a current carrying long wire — this matches (IV) Right hand rule. Grip the wire with the right hand, thumb along the current; the curled fingers give the field direction.
(C) Force experienced by a moving charged particle in the magnetic field — this matches (II) Fleming’s left hand rule. It gives the direction of the force \( q\vec{v}\times\vec{B} \) (for a positive charge).
(D) Direction of deflection of magnetic needle due to current in the wire — this matches (I) Ampere’s swimming rule. A swimmer along the current facing the needle sees the north pole deflect towards the left hand.