Intro to electricity

Which one is the responsible of electricity to happen?

• Nucleus

• Neutron

• Electron

• Proton

Answer explanation

All things are made up of atoms. At the center of the atom, known as

the nucleus, there are two types of particles: protons (particles with a positive charge) and neutrons (particles with no

charge). Electrons are particles with a negative charge. They revolve around the nucleus and they are responsible for

forming the energy that we call electricity.

Which of the following is a conductor?

• Copper

• Ceramics

• Plastic

• Wood

Answer explanation

Copper is a well-known conductor of electricity, allowing electric current to flow easily. In contrast, ceramics, plastic, and wood are insulators, which do not conduct electricity effectively.

What is an electric circuit?

• A closed path for electrons to flow

• An open path for electrons to flow

• An electrical component

• A set of switch mechanisms

Answer explanation

An electric circuit is defined as a path for electrons to flow, allowing electrical energy to be transferred when it's closed. The other options describe components or mechanisms but do not capture the essence of what a circuit is.

What do we call materials that do not allow electricity to pass through?

• Insulators

• Receptors

• Conductors

• Generators

Answer explanation

Materials that do not allow electricity to pass through are called insulators. They resist the flow of electric current, unlike conductors, which facilitate it.

What is the purpose of a generator in an electric circuit?

• To transform energy

• To supply electric current

• To regulate the circuit

• To store energy

Answer explanation

The primary purpose of a generator in an electric circuit is to supply electric current. It converts mechanical energy into electrical energy, providing the necessary power for the circuit to function.

Which one is going to transform electrical energy into mechanical rotation energy?

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Answer explanation

An electric motor is a type of receptor used to transform electrical energy into mechanical rotation energy. A LED is a type of receptor that transforms electrical energy into light energy, or in other words, into light. A buzzer is a type of receptor that transforms electrical energy into sound energy, or in other words, into sound. A resistance transforms electrical energy into heat (and reduces the current of the circuit)

What is the unit of measurement for electrical resistance?

• Volt

• Ampere

• Ohm

• Watt

Answer explanation

The unit of measurement for electrical resistance is the Ohm. It quantifies how much a material opposes the flow of electric current, while Volt measures electric potential, Ampere measures current and watts power.

What type of current flows in one direction?

• Residual current

• Direct current

• Static current

• Alternating current

Answer explanation

Direct current (DC) flows in one direction, unlike alternating current (AC), which changes direction periodically. Residual and static currents are not defined by directionality in the same way.

What is the function of a switch in an electric circuit?

• To store energy

• To transform energy

• To supply energy

• To regulate the circuit

Answer explanation

A switch in an electric circuit serves to regulate the flow of electricity. It can open or close the circuit, allowing or stopping the current, which is essential for controlling devices and ensuring safety.

What is the electrical symbol for a battery?

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• 
• 

Answer explanation

The electrical symbol for a battery is represented by a long line with a plus and a shorter and thciker one with a minus sign, indicating the positive and negative terminals. This symbol is widely recognized in electrical diagrams.