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Q 1/12
Score 0
If the resistivity of a material is increased while keeping the length and cross-sectional area constant, what happens to the resistance?
60
The resistance increases.
The resistance becomes zero.
The resistance decreases.
The resistance remains constant.
Q 2/12
Score 0
A copper wire and an aluminum wire have the same length and cross-sectional area. If the resistivity of copper is lower than that of aluminum, which wire has greater resistance?
60
The copper wire.
Both have the same resistance.
The aluminum wire.
Cannot be determined without more information.
12 questions
Q.
If the resistivity of a material is increased while keeping the length and cross-sectional area constant, what happens to the resistance?
1
60 sec
Q.
A copper wire and an aluminum wire have the same length and cross-sectional area. If the resistivity of copper is lower than that of aluminum, which wire has greater resistance?
2
60 sec
Q.
How does the resistance of a cylindrical conductor change if its length is doubled and its cross-sectional area is halved?
3
60 sec
Q.
A metal wire has a resistance R at temperature T. If the temperature of the wire increases, what generally happens to its resistance?
4
60 sec
Q.
If the resistivity of a material is 2 × 10^{-8} Ω·m, its length is 10 m, and the cross-sectional area is 0.5 × 10^{-6} m², what is the resistance of the material?
5
120 sec
Q.
If the length of a wire is tripled and the cross-sectional area is reduced to one-third, what happens to the resistance of the wire assuming resistivity remains constant?
6
60 sec
Q.
7
60 sec
Q.
How does the resistance of a wire change if both its length and its cross-sectional area are doubled, assuming resistivity remains constant?
8
60 sec
Q.
In a circuit, a wire has a resistance of 5 ohms. If a voltage of 10 volts is applied across the wire, what is the current flowing through it?
9
60 sec
Q.
Which material would typically have the lowest resistivity and thus be the best conductor of electricity?
10
60 sec
Q.
11
60 sec
Q.
If the resistivity of a material is increased while keeping the length and cross-sectional area constant, what happens to the resistance?
