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1 . Doping is the process of introducing????.into a semiconductor material.




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2 . In conductors, the valence and conduction bands overlap




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3 . The shells of an atom represent various energy levels




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4 . ??is responsible for partial conduction in semiconductor.




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5 .

The electric field produced due to recombination of holes and electrons at a p-n junction creates the






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6 . About???? volts is required to overcome the potential barrier is silicon diode.




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7 . Zener diodes are designed to operate in




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8 . In full wave rectification with a center-tap transformer, how many diodes are required?




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9 . For three phase ac rectification how many diodes are required?




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10 . Three phase rectification provides smoother output than single phase?




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11 . One purpose of using a capacity (usually electrolytic) in a power supply is for




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12 . Apart from a capacitor,??. can also be used remove ac ripples.




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13 . A diode behaves like a non-return valve.




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14 . In removing ac ripples with a capacitor, it must be connected in parallel with the load




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15 . For proper transistor action, the base-emitter junction must be forward biased, and the collector-emitter junction must be reverse biased for a common emitter configuration.




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16 . As an amplifier, a transistor operates in the??????????????? region




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17 . As a switch the transistor operates in how many regions?




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18 . As a switch that is ON the transistor operates in the?????region




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19 . The emitter current is the sum of base current and collector current.




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20 . In a transistor the collector junction is more heavily doped than the emitter junction




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21 . The ninth shell of an atom is capable of containing ??????. electrons.




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22 . Materials whose electrical properties lie between those of conductors and insulators are known as




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23 . A semiconductor doped to have holes as majority charge carriers is a ???(material).




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24 . A semiconductor doped to have electrons as majority charge carriers is ???(material).




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25 . Boron is an acceptor element.




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26 . Phosphorous is a donor element.




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27 . During partial conduction in a semiconductor ?????? move relative to electrons.




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28 . A semiconductor in its pure state is said to be




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29 . A p-type material joined to an n-type material forms an electronic component called




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30 . About ???? volts is required to overcome the potential barrier is germanium diode.




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31 .

The purpose of using a capacitor (usually ceramic) in a power supply is for






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32 . The process of removing ac ripples from a rectified ac power is called




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33 . In an n-p-n transistor action, all the electrons from the emitter do not recombine with hole at the base.




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34 .

As a switch that is OFF the transistor operates in the.........................region.






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35 . The optimum point on a transistor load line is called the




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36 .

The condition for maximum power transfer is that the load resistance must be equal to






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37 . The static input resistance of a transistor is given by




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38 . The static output resistance of a transistor is given by




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39 . The static current gain of a transistor is given by




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40 .

Which of the following can be used for voltage stabilization?






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