Welcome to the Resistivity MDCAT MCQs with Answers. In this post, we have shared Resistivity Multiple Choice Questions and Answers for PMC MDCAT 2024. Each question in MDCAT Physics offers a chance to enhance your knowledge regarding Resistivity MCQs in this MDCAT Online Test.
Resistivity MDCAT MCQs Test Preparations
Resistivity is measured in:
a) Ohm-meter
b) Volt-meter
c) Ampere-meter
d) Watt-meter
Resistivity is a property of:
a) A material
b) A circuit
c) A current source
d) An electric field
The resistivity of a material depends on its:
a) Temperature
b) Length
c) Cross-sectional area
d) Voltage
Which material has the lowest resistivity?
a) Silver
b) Copper
c) Gold
d) Aluminum
Resistivity is inversely proportional to:
a) Conductivity
b) Temperature
c) Voltage
d) Current
As the temperature of a conductor increases, its resistivity generally:
a) Increases
b) Decreases
c) Remains constant
d) Becomes zero
The resistivity of a semiconductor with increasing temperature:
a) Decreases
b) Increases
c) Remains constant
d) Varies randomly
The resistivity of a metal wire is typically:
a) Low
b) High
c) Infinite
d) Zero
A material with high resistivity is typically:
a) An insulator
b) A conductor
c) A semiconductor
d) A superconductor
The resistivity of pure silicon at room temperature is:
a) Moderate
b) High
c) Low
d) Infinite
Which of the following materials is considered a good conductor due to its low resistivity?
a) Copper
b) Iron
c) Wood
d) Rubber
The unit of electrical resistivity is:
a) Ω·m
b) Ω/m
c) Ω/m²
d) Ω
The resistivity of a perfect conductor is:
a) Zero
b) Very high
c) Infinite
d) Undefined
Which factor does not affect the resistivity of a material?
a) Temperature
b) Material composition
c) Cross-sectional area
d) Impurities
The resistivity of carbon at room temperature is:
a) High
b) Low
c) Moderate
d) Infinite
Resistivity is directly proportional to:
a) The resistance of the material
b) The current through the material
c) The voltage across the material
d) The power dissipated
As the temperature decreases, the resistivity of most metals:
a) Decreases
b) Increases
c) Remains constant
d) Becomes infinite
The resistivity of an alloy is generally:
a) Higher than its constituent metals
b) Lower than its constituent metals
c) Equal to the average of its constituent metals
d) Independent of its constituent metals
For a given material, if the temperature coefficient of resistivity is positive, then as temperature increases, the resistivity:
a) Increases
b) Decreases
c) Remains constant
d) Becomes zero
Which of the following has the highest resistivity?
a) Glass
b) Aluminum
c) Copper
d) Silicon
The resistivity of a material is defined as:
a) The resistance per unit length and cross-sectional area
b) The product of resistance and cross-sectional area
c) The inverse of conductivity
d) The product of voltage and current
Superconductors are materials with resistivity:
a) Close to zero
b) Very high
c) Infinite
d) Variable
Which material has higher resistivity: Nichrome or Copper?
a) Nichrome
b) Copper
c) Both have the same resistivity
d) It depends on temperature
The resistivity of an insulator is typically:
a) High
b) Low
c) Moderate
d) Zero
The temperature coefficient of resistivity indicates:
a) The rate of change of resistivity with temperature
b) The absolute resistivity of the material
c) The voltage drop across the material
d) The power dissipation in the material
The resistivity of semiconductors decreases with:
a) Increasing temperature
b) Decreasing temperature
c) Increasing voltage
d) Decreasing current
Which of the following factors can affect the resistivity of a semiconductor?
a) Temperature
b) Impurities
c) Electric field
d) All of the above
In a conductor, resistivity is mainly caused by:
a) Collisions between electrons and atoms
b) The potential difference
c) The magnetic field
d) The capacitance of the material
Which material typically has the highest resistivity?
a) Rubber
b) Copper
c) Aluminum
d) Silver
For a given material, resistivity is:
a) A constant
b) A variable
c) Dependent on the shape of the material
d) Inversely proportional to resistance
The resistivity of a conductor is defined as the:
a) Resistance per unit length and cross-sectional area
b) Voltage per unit length
c) Current per unit cross-sectional area
d) Power per unit resistance
The resistivity of a wire does not depend on its:
a) Length
b) Cross-sectional area
c) Material
d) Temperature
Resistivity is represented by the symbol:
a) ρ
b) σ
c) ε
d) λ
The resistivity of metals typically increases with:
a) Increasing temperature
b) Increasing pressure
c) Increasing current
d) Increasing magnetic field
Resistivity of a conductor at absolute zero temperature is:
a) Very low
b) Infinite
c) Zero
d) Moderate
The resistivity of a pure metal at room temperature is generally:
a) Lower than that of alloys
b) Higher than that of alloys
c) The same as that of alloys
d) Variable
The resistivity of a substance is affected by:
a) Temperature
b) Pressure
c) Mechanical stress
d) All of the above
Resistivity of a material is not affected by:
a) The shape of the material
b) The type of material
c) Temperature
d) Impurities
Which of the following best describes the relationship between resistivity (ρ) and conductivity (σ)?
a) ρ = 1/σ
b) ρ = σ
c) ρ = σ²
d) ρ = 1/σ²
Which of the following has a resistivity closest to that of copper?
a) Gold
b) Aluminum
c) Iron
d) Silver
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