Advertisements
Advertisements
प्रश्न
Define the term 'conductivity' of a metallic wire. Write its SI unit.
Advertisements
उत्तर
The property of a material that allows flows of electrons (or any charged particle ) between two points of the material when a potential difference is applied between these two points is called conductivity of a wire. SI unit of conductivity: Siemens per metre.
APPEARS IN
संबंधित प्रश्न
Show variation of resistivity of copper as a function of temperature in a graph.
Define the term 'electrical conductivity' of a metallic wire. Write its S.I. unit.
The following figure shows a conductor of length l with a circular cross-section. The radius of the cross-section varies linearly from a to b. The resistivity of the material is ρ. Assuming that b – a << l, find the resistance of the conductor.
For a metallic conductor, what is the relation between current density (J), conductivity (σ) and electric field intensity (E)?
In Figure 3 given below, find the value of resistance x for which points A and B are at the same potential:
figure 3
What is the colour code of a carbon resistor having a resistance of 470 Ω and a tolerance of 5%?
Two cells of 1.25 V and 0.75 V are connected in series with anode of one connected to cathode of the other. The effective voltage will be ______.
The electric resistance of a certain wire of iron is R. If its length and radius are both doubled, then ______.
