Ampère's Law and Electromagnetism Quiz

What did André-Marie Ampère discover when he ran currents through two parallel wires in the same direction?

• The wires repelled each other.

• The wires attracted each other.

• The wires created a spark.

• The wires remained stationary.

What does Ampère's Law allow you to calculate?

• The gravitational force between two masses.

• The strength of currents and magnetic fields.

• The speed of light in a vacuum.

• The energy of a photon.

In Ampère's Law, what does the constant mu_0 represent?

• The speed of light.

• The magnetic constant.

• The gravitational constant.

• The electric constant.

What is the integral in Ampère's Law used for?

• To calculate the total electric field.

• To add up all the little bits of magnetic field along the loop.

• To measure the distance between two points.

• To determine the speed of an electron.

What happens to two parallel wires when currents run through them in opposite directions?

• They attract each other.

• They generate heat.

• They repel each other.

• They create a magnetic field.

What shape is a coil of wire that acts like a magnet when current runs through it?

• A cube.

• A solenoid.

• A sphere.

• A toroid.

What does the second right-hand rule help you determine?

• The speed of the current.

• The direction of the force on a current-carrying wire.

• The direction of the electric field.

• The direction of the magnetic field.

How do electric motors utilize the principles of electromagnetism?

• By using static electricity to create motion.

• By continuously flipping the direction of the electric current to make loops of wire spin.

• By using gravitational forces to turn the motor.

• By generating heat to power mechanical work.