Resistance

What is the SI unit for resistance?

• Ohm

• Volt

• Ampere

• Watt

What does resistance do to the flow of electric charges?

• Enhances it

• Opposes it

• Amplifies it

• Neutralizes it

What happens to electrical energy when resistance occurs?

• It is completely lost

• It doubles

• It is absorbed and changed to other forms

• It remains unchanged

In the rugby analogy, what do the players on the blue and black team represent?

• Electric current

• Moving electrons

• Resistance

• Atoms of matter

Which material is likely to have high resistance?

• Plastic

• Silver

• Copper

• Metal

What is the effect of a wide wire on resistance?

• No effect

• Doubles resistance

• Decreases resistance

• Increases resistance

How does the length of a wire affect its resistance?

• Longer wire has more resistance

• Shorter wire has more resistance

• Both have equal resistance

• Length has no effect

What happens to resistance when the temperature of a wire increases?

• Resistance is eliminated

• Resistance remains the same

• Resistance increases

• Resistance decreases

What are materials with virtually no resistance at extremely low temperatures called?

• Superconductors

• Semiconductors

• Insulators

• Conductors

What is the primary factor that determines how much resistance a material has?

• Weight

• Shape

• Color

• Type of material