Final Exam Practice Electricity and Magnetism

What is electricity defined as?

• The flow of neutrons in an atom

• Energy resulting from the presence of charged particles (electrons)

• The buildup of electric charges on an object

• The force that causes electrons to flow

What happens when atoms gain or lose electrons?

• They become neutral

• They turn into protons

• They form a charged atom, also known as an ion

• They create static electricity

What does the Law of Electric Charges state?

• All charges are neutral.

• Like charges repel each other and unlike charges attract.

• Electrons and protons are always equal.

Tags

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What causes static electricity?

• The loss of static electricity as charges move off an object

• The flow of electric charges

• The buildup of electric charges on an object

• The pressure that creates the force to cause electrons to flow

What is the role of voltage in the movement of electrons?

• It decreases the speed of electrons

• It balances the charge between electrons and protons

• It creates a force that causes electrons to flow

• It stops the flow of electrons

Tags

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What is resistance a measure of in electrical systems?

• Electrical current

• Electrical friction

• Voltage

• Power

Which material is known for having low resistance due to its properties as a conductor?

• Plastic

• Wood

• Copper

• Rubber

How does the thickness of a wire affect its resistance?

• Thicker wires have higher resistance

• Thinner wires have higher resistance

• Thickness does not affect resistance

• Only material affects resistance, not thickness

What happens to the resistance of a metal as its temperature increases?

• Resistance decreases

• Resistance increases

• Resistance remains constant

• Resistance initially increases then decreases

What is the unit of measurement for amperage?

• Volts

• Ohms

• Watts

• Amps