Electromagnetic Induction IGCSE

The process of inducing an electric current with a magnetic field known as electromagnetic induction.

• True

• False

Tags

NGSS.HS-PS2-5

Which law states that the induced e.m.f. and the current constantly oppose the source that produces them?

• Lenz's

• Charle's

• Faraday's

• Coulomb's

A current produced by an induced e.m.f. is called?

• Induced current

• Magnetic current

• Current flow

• Current

Tags

NGSS.HS-PS2-5

What is/are the factor/s involved in Faraday's Law?

• Time

• Flux

• Number loops

• All of the choices

Describe the direction of current in an AC generator?

• The electric current reverses direction regularly.

• The electric current flows is permanent. 

• The flow of electric current is irreversible. 

• The electric current flows in one direction. 

Tags

NGSS.HS-PS2-5

When the voltage in the secondary coil decreases, it is called step-down transformer.

• True

• False

What is the contribution of Joseph Henry to the world of electromagnetism?

• Discovered electrons

• Discovered the electromagnetic phenomenon of self-inductance

• Formulated Lenz's law

• Concluded that lightning contains electricity

Tags

NGSS.HS-PS3-5

AC Generator: As the loop rotates clockwise, it cuts across decreasing number of field lines until it becomes zero when the armature is vertical.

• True

• False

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

When an electric current runs through a wire, a magnetic field is induced …

• a. Around the wire

• b. Parallel to the wire

• c. Under the wire

• d. through the wire

Tags

NGSS.HS-PS2-5

How would you reverse the direction of the current flowing through the coil in Faraday's experiment?

• Use a magnet of opposite polarity

• Move the magnet through the coil faster

• Reverse the magnet's direction

• Use a larger magnet

Tags

NGSS.HS-PS2-5