How ELECTRICITY works - working principle

Which subatomic particles are primarily responsible for the flow of electric current?

• Protons

• Neutrons

• Electrons

• All of the above

What is the primary difference between a conductor and an insulator?

• Conductors have more protons.

• Insulators have more neutrons.

• Conductors have loosely bound electrons.

• Insulators have a higher atomic mass.

A closed circuit is essential for the flow of electric current. Why?

• To provide a path for electrons to travel.

• To prevent short circuits.

• To increase the voltage.

• To decrease the resistance.

According to Ohm's Law, if the voltage in a circuit increases while the resistance remains constant, what will happen to the current?

• It will decrease.

• It will remain the same.

• It will increase.

• It will depend on the type of conductor.

If a resistor is added in series to a circuit, what will happen to the overall resistance?

• It will decrease.

• It will remain the same.

• It will increase.

• It will depend on the value of the resistor.

A light bulb is connected to a battery. If the resistance of the light bulb increases, what will happen to its brightness?

• It will increase.

• It will remain the same.

• It will decrease.

• It will depend on the type of battery.

What is the primary difference between direct current (DC) and alternating current (AC)?

• DC flows in one direction, while AC flows back and forth.

• DC is produced by batteries, while AC is produced by generators.

• DC has a higher voltage than AC.

• DC is safer than AC.

Which of the following components is primarily used to store electrical energy?

• Resistor

• Capacitor

• Transformer

• Switch

A transformer is used to:

• Increase or decrease voltage.

• Store electrical energy.

• Convert electrical energy into mechanical energy.

• Protect circuits from overloading.

Electromagnetism is the interaction between:

• Electricity and magnetism.

• Electricity and gravity.

• Magnetism and heat.

• Magnetism and sound.