Week 32 HW Physics

What is the unit of resistance?

• Volts

• Watts

• Ohms

• Amperes

What does the symbol 'Ω' stand for?

• Voltage

• Current

• Resistance

• Power

What is the unit of current?

• Volts

• Ohms

• Watts

• Amperes

For an electric current to flow, what is required?

• A continuous path (circuit)

• A single point of contact

• A broken path

• A static charge

What happens to electrons as they move through a wire, causing resistance?

• Electrons move freely without interacting with metal atoms.

• Electrons bounce off metal atoms in wire and speed up.

• Electrons bounce off metal atoms in wire and slow down.

• Electrons are absorbed by metal atoms, causing no resistance.

Based on the diagram, which path shows a good conductor?

• The smoother top path

• The rougher bottom path

• Both paths are equally good conductors

• The diagram does not indicate which is a good conductor

Which of the following factors does NOT affect the resistance of a wire?

• Length of the wire

• Area of the wire

• Resistivity of the material

• Color of the wire

What is the term used to describe the property of a material that affects its resistance?

• Conductivity

• Density

• Resistivity

• Elasticity

What type of resistor has a specific value that cannot be changed?

• Variable

• Adjustable

• Fixed

• Flexible

Insulators are characterized by what type of electrical resistivity?

• Low electrical resistivity

• Moderate electrical resistivity

• High electrical resistivity

• Zero electrical resistivity