Solid State Devices

131. The average dc voltage of a full wave rectifier circuit is _________ of the value of the peak input voltage.

1. 31.8%
2. 48.1%
3. 63.6%
4. 1%

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132. The averaged dc voltage of a half wave rectifier circuit is _________ of the value of the peak input voltage.

1. 63.6%
2. 31.8%
3. 4.8%
4. 6.2%

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133. The barrier potential for a silicon diode at 25°C is approximately

1. 0.4 V
2. 0.3 V
3. 0.7 V
4. 0.5 V

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134. The break up of nuclei into nuclear fragments that are themselves nuclei is called

1. Fission
2. Isotope
3. Neutrino
4. Atom

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135. The charge of proton has the same value to that of an electron but

1. Opposite in sign
2. Greater in some cases
3. Lesser than in some cases
4. Usually not important

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136. The creation of free electrons through zener effect is also known as

1. Avalanche emission
2. Thermionic emission
3. Low-field emission
4. High-field emission

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137. The creation voltage in a conductor or semiconductor by illumination of one surface

1. Dember effect
2. Skin effect
3. Destriau effect
4. Night effect

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138. The current gain of an emitter follower circuit is

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

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139. The drift transistor has a high frequency cut off

1. Due to the resistance of the base area
2. Since high collector voltage can be used
3. Due to its low inherent internal capacitance and low electron transmit time through the base
4. Due to the large area

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140. The eight electrons which are tightly held by the atom are called

1. Valence electrons
2. Outermost electrons
3. Bound electrons
4. Covalent electrons

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