Advertisements
Advertisements
प्रश्न
Define the term 'electrical conductivity' of a metallic wire. Write its S.I. unit.
Advertisements
उत्तर
The electrical conductivity of a metallic wire is defined as the ratio of the current density to the electric field it creates.
Electrical conductivity, `σ J/E` S.I. unit = (mho m-1) or (ohm m).-1
APPEARS IN
संबंधित प्रश्न
Show variation of resistivity of copper as a function of temperature in a graph.
Define current density. Write an expression which connects current density with drift speed
The heat developed in a system is proportional to the current through it.
An electrolysis experiment is stopped and the battery terminals are reversed.
The specification on a heater coil is 250 V, 500 W. Calculate the resistance of the coil. What will be the resistance of a coil of 1000 W to operate at the same voltage?
The ______, a property of materials C, Si, and Ge depends upon the energy gap between their conduction and valence bands.
Assertion: Bending a wire does not effect electrical resistance.
Reason: Resistance of wire is proportional to resistivity of material.
The equivalent resistance between A and B is ____________.
As the temperature of conductor increase, it's resistivity and conductivity change. The ratio of resistivity to conductivity.
