Physics Unit 6 Blitz

Front

What is created when current flows through a coil of insulated wire wound on an iron core?

Back

An electromagnet.

Front

What component in a simple DC motor reverses the current every half revolution of the loop?

Back

The armature.

Front

What do AC induction motors not require?

Back

Brushes.

Front

What causes opposite poles of two magnets to be attracted to each other?

Back

Magnetism.

Front

What is geothermal energy production?

Back

The generation of electric power from the use of the energy in hot rocks in the earth.

Front

Define electromagnetism.

Back

The interaction of electric currents or fields and magnetic fields.

Front

What is the function of a galvanometer?

Back

To measure small amounts of electric current.

Front

What is the role of the stator in an electric motor?

Back

To provide a magnetic field for the rotor to turn within.

Front

What is the difference between AC and DC current?

Back

AC (Alternating Current) changes direction periodically, while DC (Direct Current) flows in one direction.

Front

What is the principle behind the operation of a transformer?

Back

To change the voltage of alternating current using electromagnetic induction.