Physics-18 Electromagnetic induction preflashcard

Front

What is a transformer?

Back

A transformer is a device that increases or decreases the voltage of alternating current.

Front

What is electromagnetic induction?

Back

Electromagnetic induction is the process of creating a current in a circuit by changing a magnetic field.

Front

What is an AC generator?

Back

An AC generator is a device where a coil of wire is rotated in a magnetic field, generating a current as it cuts through the magnetic field.

Front

What is a primary coil in a transformer?

Back

The primary coil is the coil in a transformer to which the electricity supply is connected.

Front

What is induced emf?

Back

Induced emf is the electromotive force generated due to the relative motion between a magnet and a conductor in a circuit.

Front

What is Lenz's Law?

Back

Lenz's Law states that the direction of induced current is such that it opposes the change in magnetic flux that produced it.

Front

What is the role of power lines in electromagnetic induction?

Back

Power lines carry the electrical energy generated by transformers and distribute it to homes and businesses.

Front

What is Fleming's right hand rule?

Back

Fleming's right hand rule is a mnemonic used to determine the direction of induced current when a conductor moves in a magnetic field.

Front

What are slip rings?

Back

Slip rings are conductive rings that allow the transfer of current from a rotating coil to an external circuit in an AC generator.

Front

What is the relationship between magnetic fields and electric currents?

Back

A changing magnetic field can induce an electric current in a conductor, demonstrating the principle of electromagnetic induction.