SNC1W Exam Review - Electricity

Which of the following best describes the Law of Electric Charges?

• Like charges attract, unlike charges repel.

• Like charges repel, unlike charges attract.

• All charges attract each other.

• Charges do not interact with each other.

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

• Conductors allow electric charges to flow easily; insulators do not.

• Insulators allow electric charges to flow easily; conductors do not.

• Both conductors and insulators allow charges to flow equally.

• Conductors and insulators are the same.

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Which of the following is an example of static electricity?

• Lightning during a thunderstorm

• A battery powering a torch

• Current flowing through a wire

• A generator producing electricity

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Which subatomic particle is responsible for the flow of electric current in a metal wire?

• Protons

• Neutrons

• Electrons

• Positrons

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Which of the following is NOT a standard component of a direct current (DC) circuit?

• Resistor

• Battery

• Light bulb

• Transformer

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What is the SI unit for electric current?

• Volt (V)

• Ohm (Ω)

• Ampere (A)

• Watt (W)

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Which symbol is commonly used to represent resistance in a circuit diagram?

• V

• I

• R

• Q

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

• To increase the current

• To protect the circuit by breaking the connection if the current is too high

• To store electrical energy

• To convert AC to DC

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Which of the following best describes the difference between electricity and electrical energy?

• Electricity is a form of energy; electrical energy is the flow of electrons.

• Electricity is the flow of electric charge; electrical energy is the energy carried by moving charges.

• Electricity and electrical energy are the same.

• Electricity is only static; electrical energy is only current.

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Which of the following devices converts electrical energy into light energy?

• Battery

• Light bulb

• Switch

• Fuse

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