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 resistance of a wire of length L and cross-sectional area A is given by R = ρL/A. The constant ρ is called:
A.
Conductivity
B.
Resistivity
C.
Relaxation time
D.
Mobility
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ANSWER :
B. Resistivity
8.
The slope of V-I graph of an ohmic conductor gives:
A.
Power
B.
Resistance
C.
Conductance
D.
Resistivity
😑 View Answer Rough Work Error
ANSWER :
B. Resistance
9.
If V is plotted on the x-axis and I on the y-axis for an ohmic conductor, the slope of the line equals:
A.
Conductivity
B.
Resistivity
C.
Resistance R
D.
Reciprocal of resistance (1/R)
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ANSWER :
D. Reciprocal of resistance (1/R)
10.
A wire of resistance R is cut into n equal parts. These parts are then connected in parallel. The equivalent resistance of the combination is:
A.
nR
B.
R/n
C.
n²R
D.
R/n²
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ANSWER :
D. R/n²
11.
If a wire of resistance R is stretched to double its length keeping volume constant, its new resistance becomes:
A.
R
B.
R/4
C.
4R
D.
2R
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ANSWER :
C. 4R
12.
A V-I graph of a non-ohmic conductor is:
A.
A non-linear curve
B.
A straight line through the origin
C.
Always parallel to the V-axis
D.
Always parallel to the I-axis
😑 View Answer Rough Work Error
ANSWER :
A. A non-linear curve