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प्रश्न
Pieces of copper and of silicon are initially at room temperature. Both are heated to temperature T. The conductivity of ______.
विकल्प
both increases.
both decreases.
copper increases and silicon decreases.
copper decreases and silicon increases.
उत्तर
Pieces of copper and of silicon are initially at room temperature. Both are heated to temperature T. The conductivity of copper decreases and silicon increases.
Explanation:
The resistance of copper wire increases with temperature, which causes a drop in conductivity, while the resistance of silicon wire reduces with temperature, which causes an increase in conductivity.
संबंधित प्रश्न
Distinguish between 'intrinsic' and 'extrinsic' semiconductors
Distinguish between intrinsic and extrinsic semiconductor. (Give any two points).
In a p-type semiconductor, the acceptor impurity produces an energy level ______
A donor impurity results in ______.
When p-n junction diode is forward biased, then ______.
In p-type semiconductor, ______.
Explain the following term:
Extrinsic semiconductor
Two crystals C1 and C2, made of pure silicon, are doped with arsenic and aluminium respectively.
Identify the extrinsic semiconductors so formed.
Name the extrinsic semiconductors formed when pure germanium is doped with a trivalent impurity. Draw the energy band diagram of extrinsic semiconductors so formed.
The majority charge carriers in a P-type semiconductor are ______.
