Magnetic Fields Quiz

The diagram below shows three bar magnets with their poles labeled. Which configuration will result in the magnets attracting each other?

• Magnet A (N-S) Magnet B (N-S) Magnet C (N-S)

• Magnet A (S-N) Magnet B (N-S) Magnet C (S-N)

• Magnet A (N-S) Magnet B (S-N) Magnet C (N-S)

• Magnet A (S-N) Magnet B (S-N) Magnet C (S-N)

Which factors influence the kinetic energy of a moving object?

• A) Mass

• B) Gravitational force

• C) Velocity

• D) Time

• E) Temperature

Why does a compass needle align itself in the North-South direction?

• Because of the gravitational pull of the Earth.

• Because it is attracted to the polar ice caps.

• Because of the influence of distant stars.

• Because the Earth generates a magnetic field that interacts with the needle.

Which of the following best describes what happens to the force of attraction if the distance between two objects is decreased?

• A. It varies.

• B. It increases.

• C. It decreases.

• D. It stays the same.

Two charged objects are initially far apart. If one object is positively charged and the other is negatively charged, and they are brought closer together, what happens to the force between them?

• The attractive force becomes a repulsive force, which increases as the objects move closer to each other

• The repulsive force becomes an attractive force, which increases as the objects move closer to each other.

• The attractive force increases as the objects move closer to each other.

• The repulsive force decreases as the objects move closer to each other.

A student places two bar magnets close to each other with their north poles facing each other. What will happen when the student lets go of the magnets? Select all correct statements.

• The magnets will remain in the same position.

• The magnets will repel each other and move apart.

• The magnetic potential energy between the magnets will increase.

• The magnetic potential energy between the magnets will decrease.

• The kinetic energy of the magnets will decrease.

What is the correct interaction between two bar magnets placed end to end?

• A. [Diagram of magnets with N S <--> N S]

• B. [Diagram of magnets with N S <--> S N]

• C. [Diagram of magnets with S N <--> S N]

• D. [Diagram of magnets with S N <--> N S]

Two magnets are placed with their like poles facing each other. What is the reason for the top magnet hovering above the bottom magnet?

• The magnets are of different sizes.

• The like poles of the magnets repel each other.

• The opposite poles of the magnets attract each other.

• The magnets have different weights.

Which of the following best describes magnetism?

• a force that pulls on certain metals like iron

• a type of electromagnetic radiation

• a form of chemical energy

• a type of gravitational force

What is the principle behind the working of an electromagnet?

• It uses electric current to generate a magnetic field

• It uses heat to generate a magnetic field

• It uses friction to generate a magnetic field

• It uses pressure to generate a magnetic field