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Solution


Q.

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

The space surrounding a magnet in which magnetic force is exerted, is called a magnetic field. The direction of magnetic field lines at a place can be determined by using a compass needle. A compass needle placed near a magnet gets deflected due to the magnetic force exerted by the magnet.

The north end of the needle of the compass indicates the direction of magnetic field at the point where it is placed. When the magnet shown in the diagram below is moving towards the coil, the galvanometer gives a reading to the right.

(iii) A student writes a few statements after studying the principles of electromagnetism and working of electric motor:

(I) Fleming’s left hand rule is used to make electromagnet.
(II) Fleming’s left hand rule is used in electric motor.
(III) Fleming’s right hand rule is used in electric motor.
(IV) Right hand thumb rule is used in electric motor.

Choose the correct statement(s) from the following:
1 Only (I)  
2 Only (II)  
3 (I) and (III)  
4 (II), (III) and (IV)  

Ans.

(2)