Wireman – Semester 1, Module 10: Basic Electronics

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Common for Wireman Trade 1st Year

NAME *

NAME OF THE ITI *

MOBILE NUMBER *

1: Which element is used as semi conductor? *

2 points

A : Silver

B : Silicon

C : Copper

D : Aluminium

2: How many electrons in a silicon atom? *

2 points

A : 7

B : 14

C : 29

D : 32

3 : How the N type semi conductor is formed? *

2 points

A : Germanium with aluminium

B : Silicon with antimony

C : Silicon with iridium

D : Silicon with arsenic

4 : Which element is used as impurity to provide N type semi conductor? *

2 points

A : Arsenic

B : Aluminium

C : Gallium

D : Boron

5: How the P - type semiconductor is formed? *

2 points

A : Germanium with phosphorus

B : Silicon with aluminium

C : Germanium with antimony

D : Germanium with aluminium

6 : What does the depletion region behave? *

2 points

A : Conductor

B : Insulator

C : Semi conductor

D : Resisto

7: What does letter 2N indicate in the semiconductor device? *

2 points

A : The diode PN junctions

B : The number of terminals

C : The device power

D : Two junction device

8: What is the use of LED? *

2 points

A : To rectify AC to DC

B : To reduce the ripple

C : To regulate the voltage

D : To indicate light

9: What is the function of forward biased PN junction diode? *

2 points

A : Act as uni directional switch

B : Act as bi directional switch

C : Act as control switch

D : Act as limit switch

10: What is the PIV of the diode if the AC input voltage is 24V? *

2 points

A : 32 V

B : 33 V

C : 34 V

D : 36 V

11: What is the purpose of heat sink in electronic circuit? *

2 points

A : Keep temperature desired range

B : Keep voltage desired range

C : Keep currents desired range

D : Keep resistance desired range

12: Which material is used for making heat sink? *

2 points

A : Copper

B : Aluminium

C : Iron

D : Zinc

13: What is the expansion of PIV? *

2 points

A : Peak Input Voltage

B : Positive Inverse Voltage

C : Peak Inverse Voltage

D : Phase Inverse Voltage

14 : What is the relation between input AC voltage (VAC) and output DC voltage (VDC) in full wave rectifier? *

2 points

A : Vdc = 0.45 Vac

B : Vdc = 0.637 Vac

C : Vdc = 0.707 Vac

D : Vdc = 0.9 Vac

15 : Which type of filter? *

2 points

A : PI filter

B : Series Inductor filter

C : RC filter

D : Choke input LC filter

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