Electrical Resistivity and Conductivity (Series and Parallel Combinations of Resistors; Temperature Dependence of Resistance) NEET Questions

Physics - Current Electricity

Electrical Resistivity and Conductivity (Series and Parallel Combinations of Resistors; Temperature Dependence of Resistance) MCQ Questions


1.
The resistivity of a material is defined as:
A.
Resistance of a unit cube of material
B.
Resistance per unit length
C.
Resistance per unit area
D.
Resistance times length
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ANSWER :
A. Resistance of a unit cube of material
2.
The SI unit of electrical resistivity is:
A.
Ohm·m
B.
Ohm·m²
C.
Ohm
D.
Ohm/m
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ANSWER :
A. Ohm·m
3.
The SI unit of electrical conductivity is:
A.
Siemens·m
B.
Siemens/m or (Ω·m)⁻¹
C.
Siemens
D.
Ohm·m
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ANSWER :
B. Siemens/m or (Ω·m)⁻¹
4.
The reciprocal of resistivity is called:
A.
Resistance
B.
Mobility
C.
Conductivity
D.
Conductance
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ANSWER :
C. Conductivity
5.
Resistivity of a conductor depends on:
A.
Shape only
B.
Material and temperature
C.
Length and area
D.
Voltage applied
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ANSWER :
B. Material and temperature
6.
When n equal resistors each R are connected in series, the equivalent resistance is:
A.
nR
B.
R/n²
C.
n²R
D.
R/n
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ANSWER :
A. nR