Semiconductor Electronics

1. A.
   $650\text{ }nm$
2. B.
   $1243\text{ }nm$
3. C.
   $875\text{ }nm$
4. D.
   $1400\text{ }nm$

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1. A.
   $I_{L} = 20\text{ }mA;R_{L} = 250\Omega$
2. B.
   $I_{L} = 10\text{ }A;R_{L} = 0.5\Omega$
3. C.
   $I_{L} = 0.02\text{ }mA;R_{L} = 250\Omega$
4. D.
   $I_{L} = 10\text{ }mA;R_{L} = 500\Omega$

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1. A.
   (A), (C), (D) only
2. B.
   (A), (C), (E) only
3. C.
   (A), (B), (E) only
4. D.
   (A), (B), (C) only

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1. A.
   110
2. B.
   0.9
3. C.
   210
4. D.
   9

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1. A.
   Both $A$ and $R$ are true and $R$ is correct explanation $A$
2. B.
   $A$ is false but $R$ is true
3. C.
   Both A and R are true but R is NOT the correct explanation A
4. D.
   $A$ is true but $R$ is false

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1. A.
   $13.3\Omega$
2. B.
   $12\Omega$
3. C.
   $10\Omega$
4. D.
   $13\Omega$

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1. A.
   $\alpha = \frac{1 - \beta}{\beta}$
2. B.
   $\beta = \frac{\alpha}{1 - \alpha}$
3. C.
   $\alpha\beta = 1$
4. D.
   $\alpha = \frac{\beta}{1 - \beta}$

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1. A.
   (B), (D) and (E) only
2. B.
   (A) and (D) only
3. C.
   (B), (C) and (E) only
4. D.
   (C) and (E) only

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