Week 18 Practice: Introduction to MAgnetism

Front

What is magnetism?

Back

Magnetism is a physical phenomenon produced by the motion of electric charge, which results in attractive and repulsive forces between objects. It is one of the fundamental forces of nature.

Front

What is the unit of magnetic field strength?

Back

The unit of magnetic field strength is the Tesla (T).

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the energy an object possesses due to its position in a gravitational field, calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

How do you calculate velocity?

Back

Velocity is calculated by dividing the displacement by the time taken. The formula is: Velocity = Displacement / Time.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object due to its motion, calculated using the formula KE = 1/2 mv², where m is mass and v is velocity.

Front

What is the relationship between mass and gravitational potential energy?

Back

Gravitational potential energy is directly proportional to the mass of the object; as mass increases, gravitational potential energy increases.

Front

What is the principle of conservation of energy?

Back

The principle of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What is an example of a magnetic application?

Back

An example of a magnetic application is refrigerator magnets, which use magnetic forces to stick to metal surfaces.

Front

What is the formula for calculating kinetic energy?

Back

The formula for calculating kinetic energy is KE = 1/2 mv².

Front

What is the significance of air having weight?

Back

The weight of air demonstrates that it is matter, which has mass and occupies space.