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


13.
The temperature dependence of resistance is given by:
A.
R = R₀(1+αT)
B.
R = ρL/A
C.
R = V/I
D.
R = Iρ/A
😑 View Answer Rough Work Error
ANSWER :
A. R = R₀(1+αT)
14.
The reciprocal of resistivity is known as:
A.
Conductivity
B.
Resistance
C.
Resistivity
D.
Permeability
😑 View Answer Rough Work Error
ANSWER :
C. Resistivity
15.
Temperature coefficient of resistance for a metal is positive because:

NEET - 2019

A.
Resistance decreases with temperature
B.
Resistance increases with temperature
C.
Resistivity decreases with temperature
D.
None of these
😑 View Answer Rough Work Error
ANSWER :
B. Resistance increases with temperature
16.
Why do superconductors have zero resistance?
A.
Zero energy gap
B.
High electron mobility
C.
Perfect electron flow
D.
High resistance
😑 View Answer Rough Work Error
ANSWER :
A. Zero energy gap
17.
The electrical conductivity of a material is measured in:
A.
Siemens per meter
B.
Ohm per meter
C.
Ohm-meter
D.
Ohm-square meter
😑 View Answer Rough Work Error
ANSWER :
B. Ohm per meter
18.
Which factor affects the resistivity of a semiconductor the most?
A.
Temperature
B.
Pressure
C.
Magnetic field
D.
Electric field
😑 View Answer Rough Work Error
ANSWER :
A. Temperature