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Question

Which of the following(s) can be used for navigation?


A

Magnetic compass

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B

Plastic wire

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C

Wooden block

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D

Bar magnet

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Solution

The correct option is D

Bar magnet


A magnetic compass and a bar magnet when suspended freely align themselves along the geographical north-south direction, i.e. they are useful in finding the directions. Hence they are used for navigation. Wood and plastic are non-magnetic materials. They do not align along any particular direction. Hence wood and plastic cannot be used for navigation.


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