Physics

Magnetism and Electromagnetism

1,019 Questions

This hub provides practice questions on magnetism and electromagnetism. It covers magnetic flux density, electromagnets, magnetic lines of force, and electromagnetic induction. These physics concepts frequently appear in technical and non-technical competitive exams.

Electromagnet coresMagnetic flux densityMagnetic lines of forceElectromagnetic inductionBar magnet propertiesMagnetic materials

Magnetism and Electromagnetism Questions

Multiple choice

Which of the following statements is/are true?

  1. Poles are not exactly at ends but are slightly inside.

  2. A magnet has three poles, two poles at the ends and one at the center.

  3. A magnet poles can be isolated.

  4. Opposite poles of a magnet attract each other.

  5. All the above are true.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Opposite poles attract each other.

Multiple choice

Strength of a magnet is _____________.

  1. the maximum at the poles

  2. the minimum at the poles

  3. the maximum at the center

  4. the minimum at the center

  5. equal everywhere
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

It is correct.

Multiple choice

Materials that are attracted by a magnet are called

  1. magnetic materials

  2. ferroelectricity materials

  3. non-magnetic materials

  4. dielectric materials

  5. piezoelectric materials
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Materials that are attracted by a magnet are called magnetic materials.

Multiple choice

In the olden days, sailors used to find direction suspending a piece of magnet called as

  1. cylindrical magnet

  2. bar magnets

  3. dumb-bell shaped magnets

  4. horseshoe magnets

  5. v shaped
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Bar magnets are usually made of ferromagnetic materials, which are elements that can naturally have a magnetic field. Each end of a bar magnet is called a pole — one is north and the other south. When freely suspended, the magnet will align itself so that the end of its northern pole points towards the Earth’s magnetic north pole.

Multiple choice

Magnets do not lose their magnetic property by

  1. getting hammered

  2. being dropped

  3. being heated

  4. losing alignment

  5. rubbing
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

A rectangular iron bar, an iron needle, a blade or an iron nail can be turned into a magnet by rubbing a bar magnet over it.

Multiple choice

Which of the following is not a magnetic property?

  1. A magnet always has two poles

  2. Unlike poles attract each other

  3. A magnet always points to north-south direction

  4. Like poles repel each other

  5. A magnet with a single pole exists
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

A magnet with a single pole doesn't exist. All magnets have two poles, and they are called dipoles.

Multiple choice

A magnetic compass is used to indicate the

  1. temperature

  2. direction

  3. weight

  4. length

  5. current
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The magnetic needle in the compass points in the north-south direction. By aligning the dial properly, the directions can be found.