Grade 8: Savaas T2 L1-3

What is electromagnetic induction?

• The process of creating an electric current by moving a conductor through a magnetic field.

• The process of creating a magnetic field by moving a conductor through an electric current.

• The process of creating an electric current by heating a conductor.

• The process of creating a magnetic field by cooling a conductor.

What does a magnetic field explain about magnets?

• How magnets can be seen.

• How magnets can interact without touching.

• How magnets can be stored.

• How magnets can be melted.

How does electric force act between objects?

• It requires direct contact between objects.

• It acts at a distance, without objects having to touch.

• It only acts when objects are moving.

• It only acts in a vacuum.

What is nuclear fusion?

• The splitting of a large atomic nucleus into smaller ones.

• When two small atomic nuclei join together to make a larger nucleus.

• The process of atoms losing electrons to form ions.

• The conversion of energy into mass.

Which of the following is NOT an example of a turbine used in power plants to generate electricity?

• Water turbine

• Wind turbine

• Steam turbine

• Solar turbine

What happens when the north pole of one magnet is brought close to the south pole of another magnet?

• They attract each other.

• They repel each other.

• They have no effect on each other.

• They create a spark.

Which of the following components are used by an electric motor to make the coil spin?

• A magnetic field and electric current

• Solar panels and batteries

• Wind turbines and gears

• Hydraulic systems and pistons

What is the Big Bang Theory?

• An idea that the universe started from one tiny point that expanded and became all the matter and energy we have today.

• A theory that the universe has always existed in its current form.

• A concept that the universe was created by a collision of two galaxies.

• An idea that the universe is shrinking over time.

What happens when like charges interact with each other?

• They attract each other.

• They repel each other.

• They have no effect on each other.

• They combine to form a neutral charge.

What can happen to electrons between atoms?

• They can be gained, lost, or shared

• They can only be gained

• They can only be lost

• They remain unchanged