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

365176 Assertion :
The crystalline solids have a sharp melting point.
Reason :
All the bonds between the atoms or molecules of a crystalline solids are equally strong, that they get broken at the same temperature.

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

365177 The conductivity of semi conductor increases with increase in temperature because

1 Both number density of charge carriers and relaxation time increase
2 Number density of charge carriers increases
3 Number density of current carriers increases, relaxation time decreases but effect of decrease in relaxation time is much less than increase in number density
4 Relaxation time increases
KCET - 2019
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365178 What will be conductivity of pure silicon crystal at \(300\;K\) temperature. If electron hole pairs per \(c{m^3}\) is \(1.072 \times 10^{10}\) at this temperature, \({\mu _n} = 1350\;c{m^2}{\rm{/}}volt\,{\rm{ - }}\,s\) and \({\mu _p} = 480\;c{m^2}{\rm{/}}volt\,{\rm{ - }}\,s\)

1 \(3.14 \times {10^{ - 6}}\,mho{\rm{/}}cm\)
2 \(3 \times {10^{ - 6}}\,mho{\rm{/}}cm\)
3 \({10^{ - 6}}\,mho{\rm{/}}cm\)
4 \({10^6}\,mho{\rm{/}}cm\)
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365179 In a semiconducting material, the mobilities of electrons and holes are \(\mu_{e}\) and \(\mu_{h}\) respectively, Which of the following is true?

1 \(\mu_{e}>\mu_{h}\)
2 \(\mu_{e} < \mu_{h}\)
3 \(\mu_{e}=\mu_{h}\)
4 \(\mu_{e} < 0, \mu_{h}>0\)
AIIMS - 2006
For More Updates join with Us
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365176 Assertion :
The crystalline solids have a sharp melting point.
Reason :
All the bonds between the atoms or molecules of a crystalline solids are equally strong, that they get broken at the same temperature.

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

365177 The conductivity of semi conductor increases with increase in temperature because

1 Both number density of charge carriers and relaxation time increase
2 Number density of charge carriers increases
3 Number density of current carriers increases, relaxation time decreases but effect of decrease in relaxation time is much less than increase in number density
4 Relaxation time increases
KCET - 2019
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365178 What will be conductivity of pure silicon crystal at \(300\;K\) temperature. If electron hole pairs per \(c{m^3}\) is \(1.072 \times 10^{10}\) at this temperature, \({\mu _n} = 1350\;c{m^2}{\rm{/}}volt\,{\rm{ - }}\,s\) and \({\mu _p} = 480\;c{m^2}{\rm{/}}volt\,{\rm{ - }}\,s\)

1 \(3.14 \times {10^{ - 6}}\,mho{\rm{/}}cm\)
2 \(3 \times {10^{ - 6}}\,mho{\rm{/}}cm\)
3 \({10^{ - 6}}\,mho{\rm{/}}cm\)
4 \({10^6}\,mho{\rm{/}}cm\)
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365179 In a semiconducting material, the mobilities of electrons and holes are \(\mu_{e}\) and \(\mu_{h}\) respectively, Which of the following is true?

1 \(\mu_{e}>\mu_{h}\)
2 \(\mu_{e} < \mu_{h}\)
3 \(\mu_{e}=\mu_{h}\)
4 \(\mu_{e} < 0, \mu_{h}>0\)
AIIMS - 2006
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PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365176 Assertion :
The crystalline solids have a sharp melting point.
Reason :
All the bonds between the atoms or molecules of a crystalline solids are equally strong, that they get broken at the same temperature.

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

365177 The conductivity of semi conductor increases with increase in temperature because

1 Both number density of charge carriers and relaxation time increase
2 Number density of charge carriers increases
3 Number density of current carriers increases, relaxation time decreases but effect of decrease in relaxation time is much less than increase in number density
4 Relaxation time increases
KCET - 2019
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365178 What will be conductivity of pure silicon crystal at \(300\;K\) temperature. If electron hole pairs per \(c{m^3}\) is \(1.072 \times 10^{10}\) at this temperature, \({\mu _n} = 1350\;c{m^2}{\rm{/}}volt\,{\rm{ - }}\,s\) and \({\mu _p} = 480\;c{m^2}{\rm{/}}volt\,{\rm{ - }}\,s\)

1 \(3.14 \times {10^{ - 6}}\,mho{\rm{/}}cm\)
2 \(3 \times {10^{ - 6}}\,mho{\rm{/}}cm\)
3 \({10^{ - 6}}\,mho{\rm{/}}cm\)
4 \({10^6}\,mho{\rm{/}}cm\)
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365179 In a semiconducting material, the mobilities of electrons and holes are \(\mu_{e}\) and \(\mu_{h}\) respectively, Which of the following is true?

1 \(\mu_{e}>\mu_{h}\)
2 \(\mu_{e} < \mu_{h}\)
3 \(\mu_{e}=\mu_{h}\)
4 \(\mu_{e} < 0, \mu_{h}>0\)
AIIMS - 2006
Join With Us for More Updates
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365176 Assertion :
The crystalline solids have a sharp melting point.
Reason :
All the bonds between the atoms or molecules of a crystalline solids are equally strong, that they get broken at the same temperature.

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

365177 The conductivity of semi conductor increases with increase in temperature because

1 Both number density of charge carriers and relaxation time increase
2 Number density of charge carriers increases
3 Number density of current carriers increases, relaxation time decreases but effect of decrease in relaxation time is much less than increase in number density
4 Relaxation time increases
KCET - 2019
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365178 What will be conductivity of pure silicon crystal at \(300\;K\) temperature. If electron hole pairs per \(c{m^3}\) is \(1.072 \times 10^{10}\) at this temperature, \({\mu _n} = 1350\;c{m^2}{\rm{/}}volt\,{\rm{ - }}\,s\) and \({\mu _p} = 480\;c{m^2}{\rm{/}}volt\,{\rm{ - }}\,s\)

1 \(3.14 \times {10^{ - 6}}\,mho{\rm{/}}cm\)
2 \(3 \times {10^{ - 6}}\,mho{\rm{/}}cm\)
3 \({10^{ - 6}}\,mho{\rm{/}}cm\)
4 \({10^6}\,mho{\rm{/}}cm\)
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365179 In a semiconducting material, the mobilities of electrons and holes are \(\mu_{e}\) and \(\mu_{h}\) respectively, Which of the following is true?

1 \(\mu_{e}>\mu_{h}\)
2 \(\mu_{e} < \mu_{h}\)
3 \(\mu_{e}=\mu_{h}\)
4 \(\mu_{e} < 0, \mu_{h}>0\)
AIIMS - 2006
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