SEMICONDUCTORS MCQ

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SEMICONDUCTORS MCQ_01

BASIC INTRODUCTION

Q.01 A material which has a resistance in between that an insulators and of a conductor is known as___

1 point

semiconductor materials

insulation

conductors

power electronics

Clear selection

Q.02 which of the main features of intrinsic semiconductors?

1 point

it has negative temperature coefficient

its resistance is more than conductors and less then insulators

±4 valance electrons

all of the above

Clear selection

Q.03 A semi conductors is in its purest form is known as___.

1 point

extrinsic semi conductors

intrinsic semiconductors

combinations of A and B

trivalent substance

Clear selection

Q.04 The conductivity of semiconductor is to be increased by adding impurity elements is known as___

1 point

doping

increase energy gap

reduced energy gap

increase forbidden gap

Clear selection

Q.05 When the number of free electrons increased the doped semiconductor is ____

1 point

negative or N-type

positive or P-type

negative or P-type

positive or N-type

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Q.06 Which of the following is/are true?

1 point

for metal resistivity 10-8 ohm-m

for insulator resistivity 1012 to 1020 ohm-m

for semiconductor resistivity 10-4 to 107 ohm-m

all of the above

Clear selection

Q.07 In semiconductor the highest filled band is called___

1 point

valance band

conduction band

forbidden gap

none of the above

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Q.08 The conduction band and valance band are separated by region is called

1 point

valance band

conduction band

forbidden energy gap

none of the above

Clear selection

Q.09 The energy bands which is completely filled at zero K is known as____

1 point

conduction band

valance band

energy band

forbidden energy band

Clear selection

Q.10 Which of the following band has highest energy level?

1 point

conduction band

valance band

energy band

forbidden energy band

Clear selection

Q.11 At absolute zero temperature, semiconductors behaves as___

1 point

perfect conductor

perfect insulators

extrinsic semiconductor

none of the above

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Q.12 The forbidden energy gap of silicon is ____and for germanium is ____

1 point

1.1 eV; 1.1 eV

0.72 eV; 1.1 eV

1.1 eV; 0.72 eV

0.72 eV; 0.72 eV

Clear selection

Q.13 In semiconductor the forbidden energy gap between the conduction band and valence band is ____

1 point

about 5 eV

1 eV

2.5 eV

7.2 eV

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Q.14 In semiconductor the vacant energy state in the valance band is known as__

1 point

holes

positive charge

electrons

negative charges

Clear selection

Q.15 Holes in semiconductor drifts in ____ to electrons with ___ speed.

1 point

same direction; lesser

opposite direction; lesser

same direction; more

opposite direction; more

Clear selection

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