EEP Quiz 5

Which of the following factors does NOT affect the resistance of an electrical conductor?

• Length of the conductor

• Cross-sectional area of the conductor

• Color of the conductor

• Temperature of the material

What is the relationship between resistance (R) and the length (l) of a conductor?

• R is inversely proportional to l

• R is directly proportional to l

• R is equal to l

• R is independent of l

What is the formula for resistance (R) in terms of resistivity (ρ), length (l), and cross-sectional area (a)?

• R = ρa/l

• R = l/ρa

• R = ρl/a

• R = a/ρl

What is the unit of resistivity (ρ)?

• Ohm meters (Ω m)

• Ohms (Ω)

• Meters (m)

• Ohm per meter (Ω/m)

Which material has the lowest resistivity at room temperature?

• Copper

• Aluminium

• Carbon (graphite)

• Iron

How does the resistance of a conductor change if the cross-sectional area is doubled?

• The resistance is doubled

• The resistance is halved

• The resistance remains the same

• The resistance is quadrupled

What is the resistance of an 8 m length of the same wire if the resistance of a 5 m length of wire is 600 Ω?

• 720 Ω

• 840 Ω

• 960 Ω

• 1080 Ω

If the resistance of a wire is directly proportional to its length, what is the coefficient of proportionality (k) if the resistance of a 5 m length of wire is 600 Ω?

• 100

• 120

• 140

• 160

What is the length of the same wire when the resistance is 420 Ω?

• 2.5 m

• 3.0 m

• 3.5 m

• 4.0 m

Given that the length (L) is 12 meters and the resistance (R) is 350 ohms, what is the value of the constant k?

• 29.2

• 30.5

• 28.7

• 31.0