Electricity and magnetism

What is a conductor?

• A material that allows electrons to flow easily, enabling the conduction of electricity.

• A substance that prevents the flow of electricity.

• A type of electrical device that stores energy.

• A material that only conducts heat but not electricity.

What is an electromagnet?

• A type of magnet that is always magnetic.

• A type of magnet in which the magnetic field is produced by an electric current.

• A permanent magnet made from iron.

• A magnet that can only be used in high temperatures.

What is an insulator?

• A material that allows electrons to flow easily, promoting the conduction of electricity.

• A material that does not allow electrons to flow easily, preventing the conduction of electricity.

• A substance that enhances the flow of electricity through it.

• A type of conductor that only works at high temperatures.

What is the difference between AC and DC current?

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

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

• AC (Alternating Current) is used in batteries, while DC (Direct Current) is used in household outlets.

• AC (Alternating Current) is more efficient than DC (Direct Current) for long-distance transmission.

What is the principle of electromagnetic induction?

• The process by which a changing magnetic field can induce an electric current in a conductor.

• The phenomenon where electric current creates a magnetic field.

• The ability of a conductor to resist the flow of electric current.

• The process of converting electrical energy into mechanical energy.

What is grounding in electrical systems?

• The process of transferring excess electrical charge to the earth to prevent electrical shock and equipment damage.

• A method of increasing electrical resistance in circuits.

• The technique of isolating electrical components from the power source.

• A way to enhance the voltage levels in electrical systems.

What is a magnetic field?

• The region around a magnet where magnetic forces can be detected.

• A type of energy that can be seen with the naked eye.

• A force that only exists in electric circuits.

• A phenomenon that occurs only in outer space.

What is the function of a switch in a circuit?

• To amplify the electrical signal in the circuit.

• To open or close the circuit, controlling the flow of electricity.

• To convert electrical energy into mechanical energy.

• To store electrical energy for later use.

What is magnetism?

• A force that can attract or repel certain materials, primarily metals like iron, and is produced by the motion of electric charges.

• A type of energy that can only be found in magnets.

• A phenomenon that occurs only in electrical circuits.

• A natural resource used for generating electricity.

What is static electricity?

• A type of electricity that flows continuously in a circuit.

• An imbalance of electric charges within or on the surface of a material, often resulting in a shock when discharged.

• Electricity generated by moving water in a dam.

• A form of electricity that can only be produced by batteries.