Solid State Devices

111. One of the important diode parameters which gives the magnitude of current the diode candle without burning.

1. Reverse saturation current
2. Reverse current
3. Forward current
4. Forward breakdown current

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112. Optocoupler is otherwise known as

1. Laser
2. Photodiodes
3. Optoisolator
4. Photoconductive cell

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113. Percentage ripple can be calculated by getting the _________ and multiplying the result by100%.

1. Ratio of the input resistance and input voltage
2. Product of the ac current to dc current
3. Ratio of the ac voltage to dc voltage
4. Addition of the ac and dc component of the given signal

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114. Photoconductive effect means

1. The decreased conductivity of an illuminated semiconductor junction
2. The increased conductivity of an illuminated semiconductor junction
3. The conversion of photonic energy to electromagnetic energy
4. The conversion of an electromagnetic energy to photonic energy

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115. Present atomic theories place the mass and positive charge of an atom in a central nucleus composed of protons and

1. Holes
2. Core
3. Neutrons
4. Magnetron

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116. Pure semiconductor atoms contain how many valence electrons?

1. 1
2. 2
3. 4
4. 8

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117. Pure silicon crystal atoms contain how may valence electrons as a result of covalent bonding?

1. 1
2. 4
3. 8
4. 16

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118. Reducing the number of free electrons in a doped semiconductor forms a/an _________ semiconductor.

1. N type
2. P type
3. PNPN type
4. NPN type

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119. Refers to a three-layer diode.

1. Shockley diode
2. Schottky diode
3. Diac
4. Triac

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120. Reverse recovery time of the diode is computed as the _________ of the storage time and transition interval from the forward to reverse bias.

1. Sum
2. Product
3. Quotient
4. Difference

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