Solid State Devices

171. The sharing of valence electrons to produce a chemically stable atom

1. Bound electrons
2. Crystal
3. Covalent bond
4. Recombination

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172. The sum of the resistance of the p-region and the n-region is called

1. Junction resistance
2. Extrinsic resistance
3. Intrinsic resistance
4. Bulk resistance

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173. The temperature coefficient of resistance of a semiconductor is

1. Positive
2. Negative
3. Zero
4. Infinity

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174. The time it takes to turn off a forward-biased diode is called the

1. Forward recovery time
2. Reverse recovery time
3. Recombination
4. Turn-off time

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175. The time taken by the diode to operate in the reversed condition from forward conduction.

1. Maximum power time
2. Reverse recovery time
3. Lifetime
4. Time allocation

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176. The use of _________ coupling is particularly desirable in low level, low noise audio amplifier stages to minimize hum pick up from stray magnetic fields.

1. Transformer
2. Direct
3. RC
4. LC

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177. The value of coupling capacitor, Cc in RC coupling is about

1. 0.01 µF
2. 0.1 µF
3. 10 µF
4. 100 µF

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178. The varactor diode is also called as

1. Voltage-variable capacitance
2. Varicap
3. Epicap
4. All of the above

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179. The voltage gain of an emitter follower circuit is

1. High
2. Low
3. Very high
4. Moderate

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180. The voltage that turns on an enhancement-mode device is the

1. Gate-source cut-off voltage
2. Pinch off voltage
3. Threshold voltage
4. Knee voltage

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