Magnetism and Electromagnetism Quiz

Who accidentally discovered that a current-carrying wire affects the magnetic field of a magnetic compass when they are next to each other?

• Hans Christian Andersen

• Hans Christian Oersted

• Michael Faraday

• Heinrich Hertz

This is the process of creating a temporary magnet through rubbing a permanent magnet on a ferromagnetic material such as iron. What is this process?

• Magnetism

• Magnetization

• Magnetic production

• Magnet making

When two magnets with opposite poles are placed near each other, what will happen to them?

• nothing will happen

• they will attract each other

• they will repel each other

• they will combine

This is a type of temporary magnet that is made from a coil of copper wire wound around an iron core with current flowing through the coil of copper wire. What is this magnet which can be switched on or off?

• permanent magnet

• AlNiCo

• electromagnet

• neodymium magnet

This is the imaginary field around a current carrying wire which affects other magnets or ferromagnetic materials. What do we call this field?

• electric field

• magnetic field

• force field

• field strength

Why is the magnetic field strongest near the poles of a magnet?

• because the poles generate more magnetic fields

• because there is a smaller number of flux lines near the poles

• because there is a greater number of flux lines near the poles

• because it is in the poles where the magnetic field comes out and gets in

How do we determine the direction of the magnetic field of a straight current-carrying wire?

• We use the left-hand rule

• we use the right-hand rule

• The direction of the current is pointed by the thumb

• the direction of the magnetic field is provided by how the four fingers move around the wire

If the current in a wire is directed towards you, what will be the direction of its magnetic field?

• to the left

• to the right

• clockwise

• counterclockwise

The following are devices that can be used to detect slight current produced by a moving magnetic field in a coil of copper wire. Which device is useful in this case?

• Ammeter

• Galvanometer

• Ohmmeter

• Voltmeter

Which of the following devices converts mechanical energy into electric energy?

• Electric generator

• electric motor

• hydroelectric power plants

• solar power plants