Classification of Solids
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PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365180 Mobility of electrons in \(N\)-type \(G e\) is \(5000\;\,c{m^2}{\rm{/}}volt\,\sec \) and conductivity \(5\,mho{\rm{/}}cm\). If effect of holes is negligible then impurity concentration will be

1 \(6,25 \times {10^{15}}{\rm{/}}c{m^3}\)
2 \(9.25 \times {10^{14}}{\rm{/}}c{m^3}\)
3 \(6 \times {10^{13}}{\rm{/}}c{m^3}\)
4 \(9 \times {10^{13}}{\rm{/}}c{m^3}\)
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365181 Assertion :
Crystalline solids are anisotropic and amorphous solids are isotropic.
Reason :
The amorphous solids do not have a regularity in their external shape.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365182 Statement A :
If the temperature of a semiconductor is increased then its resistance decreases.
Statement B :
The energy gap between conduction band and valence band is 10\(eV\) in semiconductors.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365183 Statement A :
If there is a large gap between the conduction band and the valence band, electrons in the valence band remain bound and no free electrons are available in the conduction band, then the material is insulator.
Statement B :
Resistance of insulators is very large.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
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PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365180 Mobility of electrons in \(N\)-type \(G e\) is \(5000\;\,c{m^2}{\rm{/}}volt\,\sec \) and conductivity \(5\,mho{\rm{/}}cm\). If effect of holes is negligible then impurity concentration will be

1 \(6,25 \times {10^{15}}{\rm{/}}c{m^3}\)
2 \(9.25 \times {10^{14}}{\rm{/}}c{m^3}\)
3 \(6 \times {10^{13}}{\rm{/}}c{m^3}\)
4 \(9 \times {10^{13}}{\rm{/}}c{m^3}\)
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365181 Assertion :
Crystalline solids are anisotropic and amorphous solids are isotropic.
Reason :
The amorphous solids do not have a regularity in their external shape.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365182 Statement A :
If the temperature of a semiconductor is increased then its resistance decreases.
Statement B :
The energy gap between conduction band and valence band is 10\(eV\) in semiconductors.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365183 Statement A :
If there is a large gap between the conduction band and the valence band, electrons in the valence band remain bound and no free electrons are available in the conduction band, then the material is insulator.
Statement B :
Resistance of insulators is very large.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
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PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365180 Mobility of electrons in \(N\)-type \(G e\) is \(5000\;\,c{m^2}{\rm{/}}volt\,\sec \) and conductivity \(5\,mho{\rm{/}}cm\). If effect of holes is negligible then impurity concentration will be

1 \(6,25 \times {10^{15}}{\rm{/}}c{m^3}\)
2 \(9.25 \times {10^{14}}{\rm{/}}c{m^3}\)
3 \(6 \times {10^{13}}{\rm{/}}c{m^3}\)
4 \(9 \times {10^{13}}{\rm{/}}c{m^3}\)
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365181 Assertion :
Crystalline solids are anisotropic and amorphous solids are isotropic.
Reason :
The amorphous solids do not have a regularity in their external shape.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365182 Statement A :
If the temperature of a semiconductor is increased then its resistance decreases.
Statement B :
The energy gap between conduction band and valence band is 10\(eV\) in semiconductors.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365183 Statement A :
If there is a large gap between the conduction band and the valence band, electrons in the valence band remain bound and no free electrons are available in the conduction band, then the material is insulator.
Statement B :
Resistance of insulators is very large.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
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PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365180 Mobility of electrons in \(N\)-type \(G e\) is \(5000\;\,c{m^2}{\rm{/}}volt\,\sec \) and conductivity \(5\,mho{\rm{/}}cm\). If effect of holes is negligible then impurity concentration will be

1 \(6,25 \times {10^{15}}{\rm{/}}c{m^3}\)
2 \(9.25 \times {10^{14}}{\rm{/}}c{m^3}\)
3 \(6 \times {10^{13}}{\rm{/}}c{m^3}\)
4 \(9 \times {10^{13}}{\rm{/}}c{m^3}\)
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365181 Assertion :
Crystalline solids are anisotropic and amorphous solids are isotropic.
Reason :
The amorphous solids do not have a regularity in their external shape.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365182 Statement A :
If the temperature of a semiconductor is increased then its resistance decreases.
Statement B :
The energy gap between conduction band and valence band is 10\(eV\) in semiconductors.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365183 Statement A :
If there is a large gap between the conduction band and the valence band, electrons in the valence band remain bound and no free electrons are available in the conduction band, then the material is insulator.
Statement B :
Resistance of insulators is very large.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
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