Advertisements
Advertisements
प्रश्न
Define specific resistance.
उत्तर
Specific resistance or resistivity of a material is the resistance of a wire of that material of the unit length and unit area of cross-section.
संबंधित प्रश्न
Write an expression connecting the resistance of a wire and specific resistance of its material. State the meaning of symbols used.
Define electrical conductivity.
A wire of length (l), made of material resistivity ρ is cut into two equal parts. The resistivity of the two parts is equal to:
The resistivity does not change if ____________.
The resistivity of insulators is of the order of:
What is the minimum resistance which can be made using five resistors each of 1/5 Ω?
The proper representation of series combination of cells obtaining maximum potential is
 |
 |
 |
 |
| (i) | (ii) | (iii) | (iv) |
The S.I unit of resistance is ______.
Find the resistivity of the material of a metallic conductor of length 2 m and area of cross-section 1.4 × 10-6 m2. The resistance of the conductor is 0.04 ohm.
State the order of specific resistance of an insulator.
