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


7.
The V-I characteristic of an ohmic conductor is:
A.
An exponential curve
B.
A curved line
C.
A parabolic curve
D.
A straight line passing through the origin
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ANSWER :
D. A straight line passing through the origin
8.
If the resistance of a wire is doubled, the current through it for the same voltage:
A.
Becomes zero
B.
Doubles
C.
Remains the same
D.
Halves
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ANSWER :
D. Halves
9.
What happens to the resistance of a conductor when its length is doubled?
A.
Becomes zero
B.
Halves
C.
Remains the same
D.
Doubles
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ANSWER :
D. Doubles
10.
Which of the following materials is considered an ohmic conductor?
A.
LED
B.
Copper
C.
Zener diode
D.
PN junction diode
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ANSWER :
B. Copper
11.
The V-I graph for a certain device is given. Which device does it represent? (Graph shows non-linear variation)

NEET - 2019

A.
Resistor
B.
Filament bulb
C.
Superconductor
D.
Ohmic conductor
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ANSWER :
B. Filament bulb
12.
In non-ohmic conductors, the V-I graph is:
A.
Linear
B.
Non-linear
C.
A straight line
D.
A hyperbolic curve
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ANSWER :
B. Non-linear