Question

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

• A. Magnetic compass
• B. Plastic wire
• C. Wooden block
• D. Bar magnet

Answer 1

Answer: (A), (D)

The correct options are
A

Magnetic compass

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.