Resistivity Of Materials -Multiple Choice Questions Quiz

Question 1: What is resistivity?

(a) The ability of a material to conduct electricity.
(b) The opposition of a material to electric current flow.
(c) The ability of a material to generate electricity.
(d) The rate of change of voltage with respect to current.

Question 2: Which of the following units is used to measure resistivity?

(a) Ohm
(b) Ampere
(c) Volt
(d) Ohm-meter

Question 3: Which material would have the highest resistivity?

(a) Silver
(b) Copper
(c) Aluminum
(d) Rubber

Question 4: Which property of a material does resistivity depend on?

(a) Temperature
(b) Length
(c) Width
(d) Mass

Question 5: What is the relationship between resistivity (ρ), resistance (R), and cross-sectional area (A) of a uniform conductor?

(a) ρ = R/A
(b) ρ = R × A
(c) R = ρ/A
(d) R = ρ × A

Question 6: Which of the following materials has the lowest resistivity?

(a) Iron
(b) Gold
(c) Aluminum
(d) Graphite

Question 7: What happens to the resistance of a conductor if its length is doubled while keeping the cross-sectional area constant?

(a) Resistance doubles
(b) Resistance halves
(c) Resistance remains the same
(d) Resistance increases fourfold

Question 8: Which type of material exhibits a negative temperature coefficient of resistivity?

(a) Semiconductors
(b) Superconductors
(c) Insulators
(d) Conductors

Question 9: Which factor affects the resistivity of a material the most?

(a) Atomic structure
(b) Magnetic properties
(c) Color
(d) Electrical charge

Question 10: What is the SI unit of resistivity?

(a) Ohm
(b) Ampere
(c) Coulomb
(d) Ohm-meter

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Answer key:

Question 1: b

Question 2: d

Question 3: d

Question 4: a

Question 5: c

Question 6: b

Question 7: a

Question 8: b

Question 9: a

Question 10: d