Question

To shield an instrument from external magnetic field, it is placed inside a cabin made from

• A. wood
• B. ebonite
• C. iron
• D. any one of the above

Answer 1

The correct option is C

iron

1. Iron cabinet can be used as shied to protect an instrument from external magnetic field as all the magnetic field will pass through the iron.
2. It will not penetrate inside the cabinet made up of iron.

Hence, option (C) is the correct answer.