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Solution


Q.

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

Hans Christian Oersted, one of the leading scientists of the 19th century, played a crucial role in understanding electromagnetism. In 1820, he accidentally discovered that a compass needle got deflected when an electric current passed through a metallic wire placed nearby. Through this observation, Oersted showed that electricity and magnetism were related phenomena. This research later created technologies such as radio, television, and fibre optics. The unit of magnetic field was named as Oersted in his honour.

Electromagnetism is the study of electromagnetic force. It is a type of interface that happens between electrically charged particles. The electromagnetic force generally exhibits electromagnetic fields like magnetic fields, electric fields and light, and is known as one of the four essential interactions commonly known as forces in nature. The other 3 important interactions are the strong interaction, gravitation and the weak.

 

(iii) In the diagram below, the direction of magnetic field is:
1 Clockwise  
2 Anti clockwise  
3 Not any fixed direction  
4 None of these  

Ans.

(2)

It is evaluated by using Right Hand Thumb Rule.