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For a transistor, the current ratio αdc=6970. The current gain βdc is 

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Important Questions on Semiconductors

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 13 - Semiconductors>Competitive Thinking>Q 69
The value of β of a transistor is 19. The value of α will be 
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 13 - Semiconductors>Competitive Thinking>Q 74
In common base circuit of a transistor, current amplification factor is 0.95. Calculate the emitter current if base current is 0.2 mA,
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 13 - Semiconductors>Competitive Thinking>Q 81
In a N-P-N transistor about 1010 electrons enter the emitter in 2 μs, when it is connected to a battery. Then IE=---- μA (Take e=1.6×10-19 C)
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 13 - Semiconductors>Competitive Thinking>Q 82
In a common-base amplifier, the phase difference between the input signal voltage and the output voltage is
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 13 - Semiconductors>Competitive Thinking>Q 83
In a common base mode of a transistor, the collector current is 5.488 mA for an emitter current of 5.60 mA. The value of the base current amplification factor (β) will be,
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 13 - Semiconductors>Competitive Thinking>Q 86
The collector supply voltage in CE transistor amplifier is 10 V. The base current is 10 μA in the absence of the signal voltage and the voltage between the collector and the emitter is 4 V. The current gain β of a transistor is 200, then the value of the load resistance RL,
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IMPORTANT
MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 13 - Semiconductors>Competitive Thinking>Q 87
The minimum potential difference between the base and emitter required to switch a silicon transistor ON is approximately
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MHT-CET
IMPORTANT
MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 13 - Semiconductors>Competitive Thinking>Q 88
The input characteristics of a transistor in CE mode is the graph obtained by plotting