WorksheetsPSH Resistance and resistivity
Total questions: 10
Worksheet time: 6mins
The unit of resistivity is
Ω/m
Ω/m2
Ω.m
Ω.m2
What happens to the resistance when the temperature is increased?
Increases
decreases
stay the same
vary randomly
What are the factors affecting resistance ?
length
Area of cross section
nature of the material
All of the above
which of the following factor affects resistivity ?
Length
Area of cross section
nature of the material
Radius of the wire
Unit of resistance is ?
volts
ohms
Amperes
Coulombs
When the length of the wire is doubled, keeping the area of cross section same, its resistance will ?
Halved
Doubled
Added by 2
Subtracted by 2
When the area of cross-section of the wire is doubled, keeping the length same, its resistance will ?
Doubled
Halved
Subtracted by 2
Added by 2
Resistivity is
changes with length of conductor
relies on dimensions of the material
inversely proportional to area of cross section
a property of the material
This is the formula for which physical quantity Aρl
P power
V voltage
ρ resistivity
R resistance
