Ampère's Law: Crash Course Physics #33

Who discovered the connection between electricity and magnetism?

• André-Marie Ampère

• Hans Christian Ørsted

• Nikola Tesla

• Michael Faraday

What happens when two parallel wires carry electric currents in the same direction?

• They repel each other.

• They attract each other.

• They have no effect on each other.

• They create light.

How can you make a simple magnet using a wire and electricity?

• By stretching the wire very thin.

• By cooling the wire to a very low temperature.

• By wrapping a current-carrying wire into a coil.

• By heating the wire until it glows.

What is created around a long, straight wire when an electric current flows through it?

• A heat field

• A sound wave

• A magnetic field

• A light beam

What happens when two wires have electric current flowing through them in the same direction?

• They repel each other.

• They attract each other.

• Nothing happens.

• They create light.

If you point your right thumb in the direction of electric current in a wire, what do your curled fingers show?

• The direction of the wire's length.

• The direction of the magnetic field.

• The direction of the force on the wire.

• The direction of the electric charge.

When using the right-hand rule for a solenoid, if your fingers curl in the direction of the current, what does your thumb point towards?

• The length of the solenoid.

• The North pole of the magnetic field.

• The South pole of the magnetic field.

• The strength of the current.

What is the main purpose of an electric motor?

• To create light.

• To generate heat.

• To make things spin and do mechanical work.

• To store electricity.