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WorksheetsResistance, Resistivity, and Ohm's Law
Total questions: 18
Worksheet time: 27mins
(I X R)
Voltage divided by Resistance
(V / R)
Current
Power
Ohms
Watts
Voltage divided by Current
(V / I)
Current
Power
Resistance
Watts
Consider a wire length L, cross-sectional area A and a resistance R. A second wire at the same temperature has a length 2L and a cross-sectional are of 1/2A. What is the resistance of the second wire
R
2R
1/2 R
4R
What is the resistance of a wire when its length is reduced by half?
Halved
Quartered
Doubled
Quadrupled
The nichrome wire has a cross-sectional area of 1.3 × 10–7 m2 . Resistivity of nichrome = 1.1 × 10–6 Ωm and a resistance of 53 Ω. The length of the wire is
0.63 m
63 m
0.0063 m
6.3 m
A copper wire of length 2.5 m and cross-sectional area 2.4 × 10-7 m2 has a resistivity of 1.7x10-8 Ωm. What is the resistance of the wire?
1.6x10-15 Ω
1.0x10-14 Ω
0.18 Ω
5.6 Ω
A cylindrical conductor of length l, diameter D, and resistivity ρ has a resistance R. What is the resistance of another cylindrical conductor of length l, diameter D/2 , and resistivity ρ?
8R
4R
2R
R
Resistivity
changes with conditions.
relies on dimensions of the material.
is inversely proportional to resistance.
is a property of the material.
Which change decreases the resistance of a piece
of copper wire?
increasing the wire‛s length
increasing the wire‛s resistivity
decreasing the wire‛s length
decreasing the wire‛s diameter
All materials have resistance. How much resistance a material has depends on the type of material, its width, its length, and its temperature.
True
False
