मराठी

Show Variation of Resistivity of Si with Temperature in a Graph ?

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प्रश्न

Show variation of resistivity of Si with temperature in a graph ?

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उत्तर

The resistivity of Silicon with temperature is shown as

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2013-2014 (March) Delhi Set 2

संबंधित प्रश्‍न

At room temperature (27.0°C) the resistance of a heating element is 100 Ω. What is the temperature of the element if the resistance is found to be 117 Ω, given that the temperature coefficient of the material of the resistor is 1.70 × 10−4 °C−1.


A silver wire has a resistance of 2.1 Ω at 27.5°C, and a resistance of 2.7 Ω at 100°C. Determine the temperature coefficient of resistivity of silver.


The order of coloured rings in a carbon resistor is red, yellow, blue and silver. The resistance of the
carbon resistor is:

a) 24 x 106 Ω ± 5%

b) 24 x 106 Ω ± 10%

c) 34 x 104 Ω ± 10%

d) 26 x 104 Ω ± 5%


Draw labelled graphs to show how electrical resistance varies with temperature for: 

1) a metallic wire.

2) a piece of carbon


Sometimes it is said that "heat is developed" in a resistance when there is an electric current in it. Recall that heat is defined as the energy being transferred due to temperature difference. Is the statement in quotes technically correct?


Is inversion temperature always double the neutral temperature? Does the unit of temperature have an effect in deciding this question?


Define temperature coefficient of resistance of the material of a conductor. 


A metallic wire has a resistance of 3.0 Ω at 0°C and 4.8 Ω at 150°C. Find the temperature coefficient of resistance of its material.


An electrical cable of copper has just one wire of radius 9 mm. Its resistance is 5 ohm. This single copper wire of the cable is replaced by 6 different well insulated copper wires each of radius 3 mm. The total resistance of the cable will now be equal to ______.


Temperature dependence of resistivity ρ(T) of semiconductors, insulators and metals is significantly based on the following factors:

  1. number of charge carriers can change with temperature T.
  2. time interval between two successive collisions can depend on T.
  3. length of material can be a function of T.
  4. mass of carriers is a function of T.

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