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Physics

Chapter 4 - Alternating Current AC Circuits

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Chapter 5 - Dual Nature of Wave and Particle

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Chapter 6 - Atomic Spectra and X-Rays

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Chapter 7 - Lasers and Principles

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Chapter 8 - Modern Electronics and Semiconductors

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Quiz

Lesson 1: Intrinsic and Doped Semiconductors, the p-n Junction and Transistors — Picture questions (exam style)

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1.
An npn transistor in the common-emitter circuit shown: β = 80, I_B = 50 μA, R_C = 500 Ω, V_CC = 12 V. Which option is correct?
An npn transistor in the common-emitter circuit shown: β = 80, I_B = 50 μA, R_C = 500 Ω, V_CC = 12 V. Which option is correct?
I_C = 0.000625 mA, V_CE = 10 V, α = 0.9877
I_C = 4 mA, V_CE = 10 V, α = 0.9877
I_C = 4 mA, V_CE = 12 V, α = 1.0125
I_C = 4 mA, V_CE = 14 V, α = 0.9877
2.
An npn transistor in the common-emitter circuit shown: β = 150, I_B = 40 μA, R_C = 1000 Ω, V_CC = 15 V. Which option is correct?
An npn transistor in the common-emitter circuit shown: β = 150, I_B = 40 μA, R_C = 1000 Ω, V_CC = 15 V. Which option is correct?
I_C = 6 mA, V_CE = 9 V, α = 0.9934
I_C = 0.000267 mA, V_CE = 15 V, α = 1.0067
I_C = 6 mA, V_CE = 15 V, α = 0.9934
I_C = 0.6 mA, V_CE = 21 V, α = 0.9934
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