Question

Very strong magnet is:

• A. magnetic compass
• B. electromagnet
• C. bar magnet
• D. horse shoe

Answer 1

The correct option is B

electromagnet

Explanation of correct answer:

(b) Electromagnet:

1. These magnet are formed by passing a strong electric current through a magnetic substance or by keeping a magnetic substance in a strong electric field.
2. The magnets so created have a very strong magnetic field.

Explanation of incorrect answer:

(a) Magnetic compass:

1. Magnetic compass is used for geographic navigation by sailors.
2. It is a permanent natural magnetic needle.

(c) Bar magnet:

1. A bar magnet is a rectangular piece of an object, made up of iron, steel or any other ferromagnetic substance.
2. It shows permanent magnetic properties.

(d) Horse-shoe magnet:

1. U-shaped magnet is also known as horse-shoe magnet made artificially.
2. It used for producing electricity in electric bell or other equipment.

So, the correct option is (B).