Which of the following statement is true about semiconductors?

Impurity of lower group creates

n -

type semiconductors

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Impurity of higher group creates

p -

type semiconductors

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extrinsic semiconductors are formed by doping impurity

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Intrinsic semiconductors become conductors when temperature is raised

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Solution

The correct option is D Intrinsic semiconductors become conductors when temperature is raised
An extrinsic semiconductor is one that has been doped; during manufacture of the semiconductor crystal a trace element or chemical called a doping agent has been incorporated chemically into the crystal, for the purpose of giving it different electrical properties than the pure semiconductor crystal.

Hence, option "C" is the correct answer.

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Similar questions

Which of the following statements are true about semiconductors ?

(a) Silicon doped with electron rich impurity is a p-type semiconductor

(b) Silicon doped with an electron rich impurity is an n-type semiconductor

(d) An electron vacancy increases the conductivity of n-type semiconductor

S i

n -

15

(P, A s)

S i

p -

13

(A l, G a)

Silicon doped with electron-rich impurity forms .................

(a) P-type semiconductor (b) n-type semiconductor

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