Ohm’s Law (Electrical Resistance - V-I Characteristics of Ohmic and Non-Ohmic Conductors) NEET Questions

Physics - Current Electricity

Ohm’s Law (Electrical Resistance - V-I Characteristics of Ohmic and Non-Ohmic Conductors) MCQ Questions


1.
Ohm's law states that the current flowing through a conductor is:
A.
Inversely proportional to the potential difference across its ends
B.
Proportional to the square of the potential difference
C.
Independent of the potential difference
D.
Directly proportional to the potential difference across its ends, at constant temperature
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ANSWER :
D. Directly proportional to the potential difference across its ends, at constant temperature
2.
The SI unit of electrical resistance is:
A.
Volt
B.
Ohm (Ω)
C.
Ampere
D.
Coulomb
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ANSWER :
B. Ohm (Ω)
3.
Which of the following is the correct mathematical statement of Ohm's law?
A.
I = V × R
B.
R = V × I
C.
V = I/R
D.
V = IR
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ANSWER :
D. V = IR
4.
The V-I graph for an ohmic conductor is:
A.
A straight line passing through the origin
B.
A parabola
C.
A horizontal straight line
D.
A curve concave upward
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ANSWER :
A. A straight line passing through the origin
5.
Which of the following is NOT an ohmic conductor?
A.
Copper wire at constant temperature
B.
Iron wire at constant temperature
C.
Aluminium wire at constant temperature
D.
Silicon diode
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ANSWER :
D. Silicon diode
6.
The resistance of a conductor depends upon:
A.
Material only
B.
Length only
C.
Cross-sectional area only
D.
Length, area, material, and temperature
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ANSWER :
D. Length, area, material, and temperature