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Solution


Q.

Read the passage given below and answer the following questions from (i) to (v).

A current-carrying wire produces a magnetic field around it. The phenomena in which an electromotive force and current are induced by changing magnetic field through it is called induced current. It can be concluded that the induced current flows in a conductor as long as the magnetic force changes within the conductor. For the motion of the coil with respect to the magnet or vice versa, the direction of the current flowing in the conductor is determined by the direction of the relative motion of the conductor with respect to the magnetic field. The induced emf or current is directly proportional to the rate of change in the magnetic field.

(iii) A bar magnet is pushed steadily into a long solenoid connected to a meter. Which of the following would affect the magnitude of the deflection of the meter
1 How fast the magnet is pushed into the coil.  
2 Direction in which the coil is wound.  
3 End of the solenoid where the magnet enters.  
4 Pole of the magnet which enters the coil first.  

Ans.

(1)