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.
What is the SI unit of electrical resistivity?
A.
Ohm-meter
B.
Ohm
C.
Ohm-meter square
D.
Siemens
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ANSWER :
A. Ohm-meter
2.
The resistivity of a material depends on:
A.
Temperature
B.
Material type
C.
Length of the wire
D.
All of the above
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ANSWER :
D. All of the above
3.
Which of the following materials has the highest electrical conductivity?
A.
Silver
B.
Copper
C.
Gold
D.
Aluminum
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ANSWER :
A. Silver
4.
Two resistors of 6Ω and 12Ω are connected in parallel. The equivalent resistance is:

NEET - 2017

A.
4Ω
B.
18Ω
C.
3Ω
D.
9Ω
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ANSWER :
C. 3Ω
5.
The resistance of a conductor increases when:
A.
Length is increased
B.
Cross-sectional area is decreased
C.
Temperature is increased
D.
All of the above
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ANSWER :
D. All of the above
6.
Which of the following statements is true?

NEET - 2021

A.
Resistivity depends on length of conductor
B.
Resistivity depends on cross-sectional area
C.
Resistivity depends only on material
D.
Resistivity depends on current
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ANSWER :
C. Resistivity depends only on material