Electrical Resistance Quiz

What is electrical resistance measured in?

• Amperes

• Volts

• Ohms

• Watts

According to Ohm's Law, resistance (R) equals:

• Current divided by voltage

• Voltage times current

• Voltage divided by current

• Current squared

Which factor does NOT affect the resistance of a wire?

• Length of the wire

• Cross-sectional area

• The color of the wire

• Temperature

A wire's resistance will increase if:

• Its diameter is increased

• Its length is decreased

• Its temperature is increased

• Its cross-sectional area is increased

The resistance of a conductor generally:

• Decreases as temperature increases

• Increases as temperature increases

• Remains constant regardless of temperature

• Fluctuates randomly with temperature

What happens to the resistance when two identical resistors are connected in series?

• It remains the same

• It doubles

• It halves

• It becomes zero

For parallel resistors, the total resistance is:

• Always greater than the largest individual resistance

• Equal to the sum of all resistances

• Less than the smallest individual resistance

• Equal to the product of the resistances

Which material typically has the lowest electrical resistance?

• Wood

• Rubber

• Silver

• Glass

The unit 'ohm' can also be expressed as:

• Ampere per volt

• Volt per ampere

• Watt per volt

• Joule per ampere

A superconductor is a material that:

• Has infinite resistance

• Has zero resistance at certain temperatures

• Always maintains constant resistance

• Has resistance that increases with current