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1. Distinguish between the resistivity and conductivity of a conductor.
Answer variants:
reciprocal of the electrical resistivity
resistance of a conductor
conductor's resistance
\(mho\ metre^{–1}\)
material's ability to pass the current
\(ohm\ metre\)
\(\sigma =\) \(\frac{1}{\rho}\)
\(\rho =\) \(\frac{RA}{L}\)
Resistivity | Conductivity |
It is the of unit length and unit area of cross-section. | It is the of a material. |
SI unit is . | SI unit is . |
| It is a measure of to the flow of an electric current. | It is a measure of a through it. |
2. What connection is used in domestic appliances and why?
All the electric circuits in a house are connected in .
The connections are made in parallel so that the the other circuits.
Another benefit of connecting circuits in parallel is that each electrical appliance receives the .
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