Transistors
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PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365525 When \(n\)-\(p\)- \(n\) transistor is used as an amplifier:

1 Electrons move from base to collector
2 Holes move from emitter to base
3 Holes move from collector to base
4 Holes move from base to emitter
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365526 Assertion :
In a common emitter transistor amplifier, the input current is much less than the output current than output impedance.
Reason :
The common emitter transistor amplifier has higher input impedance than output impedance.

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

365527 The correct relation between current gains \(\alpha \) and \(\beta \) is

1 \(\frac{1}{\beta } = \frac{1}{\alpha } + 1\)
2 \(\frac{1}{\alpha } = \frac{1}{\beta } + 1\)
3 \(\alpha = \frac{{{\beta ^2}}}{{1 + {\beta ^2}}}\)
4 \(\frac{1}{\alpha } = 1 - \frac{1}{\beta }\)
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365528 In the circuit of \({CE}\) amplifier, a silicon transistor is used. The value of \({V}_{{CC}}=+20 {~V}, {R}_{{L}}=3 {k} \Omega\), collector voltage \(=5 {~V}, \beta=100\). Then the base resistance \(R_{B}\) should be
(Take input voltage drop across Si transistor \(=\) \(0.7 {~V}\) )
supporting img

1 \(3.86 \times {10^5}\,\Omega \)
2 \(5.34 \times {10^5}\,\Omega \)
3 \(1.38 \times {10^5}\,\Omega \)
4 \(7.65 \times {10^5}\,\Omega \)
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PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365525 When \(n\)-\(p\)- \(n\) transistor is used as an amplifier:

1 Electrons move from base to collector
2 Holes move from emitter to base
3 Holes move from collector to base
4 Holes move from base to emitter
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365526 Assertion :
In a common emitter transistor amplifier, the input current is much less than the output current than output impedance.
Reason :
The common emitter transistor amplifier has higher input impedance than output impedance.

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

365527 The correct relation between current gains \(\alpha \) and \(\beta \) is

1 \(\frac{1}{\beta } = \frac{1}{\alpha } + 1\)
2 \(\frac{1}{\alpha } = \frac{1}{\beta } + 1\)
3 \(\alpha = \frac{{{\beta ^2}}}{{1 + {\beta ^2}}}\)
4 \(\frac{1}{\alpha } = 1 - \frac{1}{\beta }\)
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365528 In the circuit of \({CE}\) amplifier, a silicon transistor is used. The value of \({V}_{{CC}}=+20 {~V}, {R}_{{L}}=3 {k} \Omega\), collector voltage \(=5 {~V}, \beta=100\). Then the base resistance \(R_{B}\) should be
(Take input voltage drop across Si transistor \(=\) \(0.7 {~V}\) )
supporting img

1 \(3.86 \times {10^5}\,\Omega \)
2 \(5.34 \times {10^5}\,\Omega \)
3 \(1.38 \times {10^5}\,\Omega \)
4 \(7.65 \times {10^5}\,\Omega \)
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PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365525 When \(n\)-\(p\)- \(n\) transistor is used as an amplifier:

1 Electrons move from base to collector
2 Holes move from emitter to base
3 Holes move from collector to base
4 Holes move from base to emitter
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365526 Assertion :
In a common emitter transistor amplifier, the input current is much less than the output current than output impedance.
Reason :
The common emitter transistor amplifier has higher input impedance than output impedance.

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

365527 The correct relation between current gains \(\alpha \) and \(\beta \) is

1 \(\frac{1}{\beta } = \frac{1}{\alpha } + 1\)
2 \(\frac{1}{\alpha } = \frac{1}{\beta } + 1\)
3 \(\alpha = \frac{{{\beta ^2}}}{{1 + {\beta ^2}}}\)
4 \(\frac{1}{\alpha } = 1 - \frac{1}{\beta }\)
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365528 In the circuit of \({CE}\) amplifier, a silicon transistor is used. The value of \({V}_{{CC}}=+20 {~V}, {R}_{{L}}=3 {k} \Omega\), collector voltage \(=5 {~V}, \beta=100\). Then the base resistance \(R_{B}\) should be
(Take input voltage drop across Si transistor \(=\) \(0.7 {~V}\) )
supporting img

1 \(3.86 \times {10^5}\,\Omega \)
2 \(5.34 \times {10^5}\,\Omega \)
3 \(1.38 \times {10^5}\,\Omega \)
4 \(7.65 \times {10^5}\,\Omega \)
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PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365525 When \(n\)-\(p\)- \(n\) transistor is used as an amplifier:

1 Electrons move from base to collector
2 Holes move from emitter to base
3 Holes move from collector to base
4 Holes move from base to emitter
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365526 Assertion :
In a common emitter transistor amplifier, the input current is much less than the output current than output impedance.
Reason :
The common emitter transistor amplifier has higher input impedance than output impedance.

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

365527 The correct relation between current gains \(\alpha \) and \(\beta \) is

1 \(\frac{1}{\beta } = \frac{1}{\alpha } + 1\)
2 \(\frac{1}{\alpha } = \frac{1}{\beta } + 1\)
3 \(\alpha = \frac{{{\beta ^2}}}{{1 + {\beta ^2}}}\)
4 \(\frac{1}{\alpha } = 1 - \frac{1}{\beta }\)
PHXII14:SEMICONDUCTOR ELECTRONICS- MATERIALS- DEVICES AND SIMPLE CIRCUITS

365528 In the circuit of \({CE}\) amplifier, a silicon transistor is used. The value of \({V}_{{CC}}=+20 {~V}, {R}_{{L}}=3 {k} \Omega\), collector voltage \(=5 {~V}, \beta=100\). Then the base resistance \(R_{B}\) should be
(Take input voltage drop across Si transistor \(=\) \(0.7 {~V}\) )
supporting img

1 \(3.86 \times {10^5}\,\Omega \)
2 \(5.34 \times {10^5}\,\Omega \)
3 \(1.38 \times {10^5}\,\Omega \)
4 \(7.65 \times {10^5}\,\Omega \)