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Basics of Electronics

Total questions: 100

Worksheet time: 1hrs 14mins

Name
Class
Date
1.

Match the symbol with the correct component.

a)

b)

c)

d)

2.
Capacitor is a device used to__________
a)
Store electrical energy
b)
vary the resistance
c)
store magnetic energy
d)
dissipate energy
3.

Identify which type of capacitor is shown in the figure?

a)

Mica

b)

Ceramic

c)

Paper

d)

Elecrtolyte

4.

____ resistors use a mixture of carbon granules and powdered ceramic as a composition materials.

a)
Carbon Composition
b)
Metal Film
c)
Carbon Film
d)
Wire Wound
5.

Potentiometer is the example of _______ type resistor.

a)
Fixed
b)
Variable
c)
Both
d)
None of the Above
6.
What is the color code for 820 ohms?
a)
Grey Red Brown
b)
Grey Blue Brown
c)
Grey Red Black
d)
White Black Black
7.

Identify the symbol which is shown in the figure

a)

Non-polar Capacitor

b)

Variable Capacitor

c)

Polar Capacitor

d)

MOS Capacitor

8.

Which among the following is not an example for active electronic component?

a)

Diode

b)

BJT

c)

Inductor

d)

FET

9.

If a resistor has a value of 47000 Ω with a tolerance of ±10%, what could be the range of its actual value?

a)

47000 Ω to 51700 Ω

b)

42300 Ω to 47000 Ω

c)

42.3 kΩ to 51.7 kΩ

d)

37000 Ω to 57000 Ω

10.

How would you interpret the colours brown, green, black, and gold in the resistor colour code?

a)

15 ohms with 5% tolerance

b)

15 kilohms with 10% tolerance

c)

15 ohms with 10% tolerance

d)

15 kilohms with 5% tolerance

11.

In a Transistor ………………..

a)

IE = IC + IB

b)

IC = IE + IB

c)

IE = IC – IB

d)

IB = IC + IE

12.

How many terminals are there in a transistor....?

a)

1

b)

2

c)

3

d)

4

13.

This is a graph that is seen on the CRO. How will it change after full wave rectification process?

a)

b)

c)

d)

14.

The energy band in which free electrons exist is know as

a)

first band

b)

second band

c)

conductive band

d)

valence band

15.

What is the equivalent or total resistance (Re) across this circuit?

a)

3 kΩ

b)

10 kΩ

c)

13 kΩ

d)

18 kΩ

16.

Which circuit diagram represents the correct way to measure the current in a resistor?

a)
b)
c)
d)
17.

When only one lightbulb blows out, an entire string of decorative lights goes out. The lights in this string must be connected in

a)

series with multiple current pathways

b)

series with one current pathway

c)

parallel with multiple current pathways

d)

parallel with one current pathway

18.

The block diagram of Linear DC Power Supply with CORRECT stage

a)

Transformer, Regulator, Filter, Rectifier

b)

Transformer, Rectifier, Filter, Regulator

c)

Transformer, Filter, Rectifier, Regulator

d)

Transformer, Rectifier, Regulator, Filter

19.

What is the process by which AC is converted to pulsating DC?

a)

Charging

b)

Rectification

c)

Filtering

d)

Clipping

20.

In the block diagram for a voltage regulator, identify the circuit that Block (A) represents.

a)

Rectifier circuit

b)

Regulator Circuit

c)

Transformer Circuit

d)

Filter Circuit

21.

In the block diagram for a voltage regulator, identify the circuit that Block (D) represents.

a)

Rectifier circuit

b)

Regulator Circuit

c)

Transformer Circuit

d)

Filter Circuit

22.

In the block diagram for a voltage regulator, identify the circuit that Block (B) represents.

a)

Rectifier circuit

b)

Regulator Circuit

c)

Transformer Circuit

d)

Filter Circuit

23.

In the block diagram for a voltage regulator, identify the circuit that Block (C) represents.

a)

Rectifier circuit

b)

Regulator Circuit

c)

Transformer Circuit

d)

Filter Circuit

24.

In a digital storage oscilloscope the peak to peak voltage is calculated as

a)

number of units x (1/division)

b)

volts/division

c)

number of units x volts

d)

number of units x (volts/division)

25.

What is the main advantage of using a digital storage oscilloscope?

a)

uses digital storage

b)

uses analog storage

c)

uses mixed mode storage

d)

uses disc storage

26.

Which of the following I-V characteristics represents a typical Si diode

a)

b)

c)

d)

27.

Which of the following I-V characteristics represents a typical Ge diode

a)

b)

c)

d)

28.

Knee current in the case of zener diode implies

a)

Forward bias current beyond which I-V characteristics is a straight line

b)

Reverse bias current above which I-V characteristics is a straight line

c)

Forward cut-in current beyond which current is directly proportional to voltage

d)

Maximum allowable reverse bias current through a zener diode

29.

Match the following:

a)

A – 4, B – 3, C – 1, D-2                         

b)

A – 3, B – 4, C – 1, D – 2

c)

A – 4, B – 3, C – 2, D – 1                    

d)

A – 1, B – 3, C – 4, D – 2

30.

The clipping of the sinewave observed in DSO happens

a)

If you set the volts/div too low

b)

If you set the sec/div too low

c)

If you set volts/div too high

d)

If you set sec/div too high

31.

What is the color code for a 5KΩ, tolerance ± 5% resistor?

a)

  1. Green, Black, Red, Silver

b)

  1. Green, Brown, Orange, Gold

c)

  1. Green, Black, Red, Gold

d)

  1. Green, Brown, Red, Gold

32.

What is the tolerance of a 3 band resistor?

a)

  1. ±0.1%

b)

  1. ±20%

c)

  1. ±0.5%

d)

  1. ±.25%

33.

Value of the capacitor is

a)

4.7 μF\mu F

b)

47 μF\mu F

c)

470 μF\mu F

d)

0.47 μF\mu F

34.

Identify the correct statement for the component given below

a)

The cathode is longer

b)

The cathode is shorter

c)

Any terminal can be taken as anode and cathode

35.

N resistors having resistance value R are connected in series. What is the equivalent resistance?

a)

R/N

b)

2R

c)

N/R

d)

N*R

36.

  The component used in a dc power supply for obtaining a constant dc value at its output is

a)

Capacitor

b)

PNP transistor

c)

Zener Diode

d)

Resistor

37.

The ‘1N’ in a 1N4001 diode stands for

a)

Current rating of 1A                                

b)

Serial number            

c)

Voltage rating of 1V

d)

Single junction

38.

  Out of the following, which one of the diodes is forward biased?

a)

b)

c)

d)

39.

In the circuits given below, the correct full wave rectifier is

a)

b)

c)

d)

40.

Identify the equipment used to set the input signal.

a)

Oscilloscope

b)

Function generator

c)

Power supply

d)

Step down transformer

41.

How many connections does a potentiometer have (a)  

42.

The tolerance bands gold,silver,brown represent

a)

10%,5%,1%

b)

5%,10%,2%

c)

5%,10%,1%

d)

10%5%,2%

43.

V = IR, which law uses this formula ?

a)

Ohm's Law

b)

Watt's Law

c)

Faraday's Law

d)

Faraday's Law

44.

Which formula can be used to calculate power ?

a)

P = I2I^2 R

b)

P = IR

c)

P = V2V^2 I

d)

P = I2I^2 V

45.

Identify the given component

a)

Zener diode

b)

Silicon diode

c)

Germanium diode

d)

LED

46.

Identify the given Equipment

a)

Power supply

b)

DSO

c)

Transformer

d)

Signal generator

47.

The relation between voltage, current and Resistance is expressed as

a)

R=V/I

b)

P=VI

c)

V=I/R

d)

P=I^2R

48.

The frequency of the given waveform is........................

a)

1KHz

b)

10KHz

c)

100Hz

d)

1Hz

49.

The thin film capacitor having code 1n0K63 in pf is......

a)

1pf

b)

10pf

c)

100pf

d)

1000pf

50.

In BC547 transistor, what does BC stands for....................

a)

Silicon low frequency

b)

Silicon high frequency

c)

Germanium low frequency

d)

Germanium high frequency

51.

The name of the region in which we connect the components in a bread board is ...........

a)

Power rail

b)

Power-socket rail

c)

None of the above

d)

Socket rail

52.

Find the resistance of a fixed reistor having colour code Green, Orange, Red

a)

5.3K+20%

b)

5.3K+10%

c)

5.2K+20%

d)

5.3K+5%

53.

The components which requires external power to operate is called………………

a)

Active Components

b)

Passive Components

c)

Reactive Components

d)

None of the above

54.

The number 104 on a capacitor indicates

a)

1nF

b)

10nF

c)

100nF

d)

1000nF

55.

Choose correct statement in the VIR Triangle

a)

Voltage=Current x Resistance

b)

Current=Voltage/Resistance

c)

Resistance=Voltage/Current

d)

All of the above

56.

Find the value of the resistor in the given circuit

a)

12Ω

b)

24Ω

c)

12KΩ

d)

48Ω

57.

What type of transistor is CK 100?

a)

NPN

b)

PNP

c)

MOSFET

d)

JFET

58.

What type of transistor is CL 100?

a)

NPN

b)

PNP

c)

MOSFET

d)

JFET

59.

The Cut-in voltage of Silicon diode is.........................................

a)

0.3V

b)

0.7V

c)

3V

d)

7V

60.

The Cut-in voltage of Germanium diode is.........................................

a)

0.3V

b)

0.7V

c)

3V

d)

7V

61.

Identify the terminals of the given component

a)

1.Emitter

2.Base

3.Collector

b)

1.Collector

2.Base

3.Emitter

c)

1.Emitter

2.Collector

3.Base

d)

1.Base

2.Emitter

3.Collector

62.

identify the Output waveform of a Half wave rectifier

a)
b)
c)
d)
63.

Identify the component

a)

Rheostat

b)

Potentiometer

c)

Trimpot

d)

Volume Control

64.

This is the symbol of

a)

Piezoelectric crystal

b)

Dipole

c)

Fuse

d)

none of the above

65.

This is symbol of

a)

PNP transistor

b)

NPN transistor

c)

UJT P type

d)

UJT N type

66.

____ can store energy in electric field and are used to store and release charge whenever that desired.

a)

Resistor

b)

Capacitor

c)

Diode

d)

Transistor

67.

The internal resistance of an ideal voltage source is ___

a)

Zero

b)

Infinity

c)

One

d)

none of the above

68.

_______ is a passive electronic component that stores energy in the form of a magnetic field.

a)

Capacitor

b)

Inductor

c)

Potentiometer

d)

ceramic resistor

69.

What is this?

a)

Television

b)

Pot?

c)

LDR

d)

Resistor?

70.

Zener diode acts as a

a)

rectifier

b)

voltage regulator

c)

potentiometer

d)

galvanometer

71.

Identify the electronic symbol.

a)

Diode

b)

Photodiode

c)

Reflective diode

d)

Light Emitting Diode

72.
What is the tolerance for a Green, Red, Black, Gold resistor?
a)
1%
b)
20%
c)
5%
d)
10%
73.

Which of the following is the correct transistor circuit symbol?

a)
b)
c)
d)
74.

Doping is a process of adding a certain amount of specific impurities to semiconductor. What is the purpose of doping?

a)

To increase the resistance of semiconductor

b)

To increase the thermal energy of semiconductor

c)

To increase the temperature of the semiconductor

d)

To increase the conductivity of the semiconductor

75.

What is the function of a diode?

a)

Acts as a current amplifier

b)

Acts as an automatic switch

c)

Stores electric charge

d)

Allows the current to pass in one direction only

76.

what is an oscillator?

a)

an amplifier

b)

a power supply

c)

a multimeter

d)

a signal generator

77.

When a PN junction is forward biased

a)

Depletion region decreases

b)

Minority carries are not Attested

c)

Holes and electrons move away from junction

d)

All of above

78.

When parallel resistors are of three different values, which has the greatest power loss?

a)

The smallest resistance

b)

The largest resistance

c)

They have the same power loss.

d)

Voltage and resistance values are needed.

79.

The voltage across any branch of a parallel circuit:

a)

varies as the total current varies

b)

is inversely proportional to total circuit resistance

c)

is equally applied to all branch conductance

d)

is dropped in proportion to each branch resistance

80.

When the temperature of the semi-conductor is increased, the conductivity will …

a)

decreases

b)

increases

c)

same every time

d)

all of the above

81.

Which type of special purpose diode is formed by a metal and semiconductor?

a)

Schottky

b)

Varactor

c)

Tunnel

d)

Zener

82.

Which among the following is a current controlled device?

a)

MOSFET

b)

BJT

c)

IGBT

d)

JFET

83.

The resistance of a uniform Conductor is directly proportional to the ________of the conductor

a)

Length

b)

Cross Sectional Area

c)

Conductivity

84.

You are given a resistor whose stripes are colored from left to right as orange, orange, brown, silver. Find the resistance value.

a)

330 Ohms

b)

33KOhms

c)

3.3 Mega Ohms

85.

Which is not one of the properties of semiconductor?

a)

4 electrons in outermost orbit, in covalent bonding.

b)

atoms vibrate causes electron to break free from the bonds.

c)

Electron free leaves hole.

d)

Semiconductor has 2 types of charge carriers.

e)

all of the above are the properties of it

86.

The number of diodes used to build a bridge rectifier

a)

1

b)

2

c)

3

d)

4

87.

Which image shows the output of a sine-wave after it has gone through a diode?

a)

b)

c)

d)

88.

Which image shows the output of a sine-wave after it has gone through a rectifier shown in the figure?

a)

b)

c)

d)

89.

Identify the given component.

a)

Trimmer

b)

Electrolytic capacitor

c)

Relay

d)

Variable inductor

90.

In the figure given below find the effective resistance across terminal 1 and 2 (red and black wire).

a)

2 kΩ

b)

1 kΩ

c)

1/2 kΩ

d)

5/3 kΩ

91.

Select the value of the given capacitor.

a)

220nF

b)

2.2nF

c)

0.22nF

d)

22pF

92.

Identify this component.

a)

Tantalum capacitor.

b)

Ceramic capacitor.

c)

Electrolytic Capacitor.

d)

Carbon film capacitor

93.

Identify the component for the given symbol.

a)

Iron core inductor.

b)

Ferrite core inductor.

c)

Tantalum core inductor.

d)

Air core inductor.

94.

Identify the component for the given symbol.

a)

Iron core inductor.

b)

Ferrite core inductor.

c)

Tantalum core inductor.

d)

Air core inductor.

95.

Which of the following is not an electrolytic capacitor

a)

Tantalum capacitor

b)

Aluminum capacitor

c)

Polyester film capacitor

d)

None of the above

96.

Identify the given equipment.

a)

DSO

b)

Function generator

c)

AC power supply

d)

Dual power supply

97.

Identify the terminals of the given component.

a)

1 -> Anode

2 -> Cathode

b)

1 -> Cathode

2 -> Anode

c)

1 -> Collector

2 -> Emitter

d)

1 -> Emitter

2 -> Collector

98.

Which of the following component is an NMOS transistor.

a)

b)

c)

d)

99.

Which of the following is a power transistor

a)

CK100

b)

CI100

c)

BC547

d)

BC557

100.

Which of the following is an npn transistor

a)

CK100

b)

BC857

c)

BC547

d)

BC557

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