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THE_HAUNTING_ARENA

Total questions: 52

Worksheet time: 17mins

Name
Class
Date
1.

The unit of resistance is:

a)

Ampere

b)

Volt

c)

Ohm

d)

Farad

2.

A diode conducts current in:

a)

Both directions

b)

Forward direction only

c)

Reverse direction only

d)

None

3.

The device used to amplify weak signals:

a)

Resistor

b)

Amplifier

c)

Diode

d)

Capacitor

4.

A capacitor stores:

a)

Energy

b)

Current

c)

Resistance

d)

None

5.

Transistor is used as:

a)

Amplifier and switch

b)

Only resistor

c)

Only rectifier

d)

Filter

6.

The transistor consists of:

a)

Two p-n junctions

b)

One junction

c)

Four junctions

d)

None

7.

The basic logic gate which inverts input:

a)

AND

b)

OR

c)

NOT

d)

NOR

8.

Boolean 1 + 1 equals:

a)

0

b)

1

c)

2

d)

None

9.

The binary of decimal 5 is:

a)

1000

b)

101

c)

110

d)

111

10.

A flip-flop stores:

a)

1 bit

b)

2 bits

c)

4 bits

d)

8 bits

11.

Modulation is used to:

a)

Reduce signal strength

b)

Transmit over long distance

c)

Increase frequency

d)

Filter signals

12.

PCM stands for:

a)

Pulse Code Modulation

b)

Phase Control Modulation

c)

Pulse Carrier Modulation

d)

None

13.

ASK means:

a)

Amplitude Shift Keying

b)

Analog Signal Keying

c)

Amplitude Serial Key

d)

None

14.

FSK stands for:

a)

Frequency Shift Keying

b)

Fast Signal Keying

c)

Fixed Signal Key

d)

None

15.

PSK stands for:

a)

Phase Shift Keying

b)

Phase Signal Key

c)

Pulse Shift Keying

d)

None

16.

Nyquist rate =

a)

2 × highest frequency

b)

Half of signal frequency

c)

Bandwidth

d)

None

17.

Sampling is the process of:

a)

Taking values at intervals

b)

Filtering

c)

Encoding

d)

Decoding

18.

In PCM, quantization error occurs due to:

a)

Rounding off levels

b)

Amplification

c)

Modulation

d)

None

19.

Digital communication is preferred because of:

a)

Noise immunity

b)

High distortion

c)

Low data rate

d)

Complexity

20.

In BPSK, number of bits per symbol:

a)

1

b)

2

c)

4

d)

8

21.

The principle of optical fiber is:

a)

Total internal reflection

b)

Diffraction

c)

Refraction

d)

Scattering

22.

The core of optical fiber has:

a)

Higher refractive index

b)

Lower refractive index

c)

Equal to cladding

d)

None

23.

Optical fiber losses are measured in:

a)

dB/km

b)

Watt

c)

Hertz

d)

Ohm

24.

Typical wavelength used in optical fiber:

a)

1550 nm

b)

2000 nm

c)

850 nm

d)

400 nm

25.

Light source used in optical communication:

a)

LED

b)

Photodiode

c)

Phototransistor

d)

None

26.

Receiver used in optical system:

a)

PIN diode

b)

LED

c)

FET

d)

Transistor

27.

EDFA is used as:

a)

Optical amplifier

b)

Modulator

c)

Switch

d)

None

28.

Dispersion causes:

a)

Pulse broadening

b)

Amplification

c)

Filtering

d)

None

29.

Multimode fibers are used for:

a)

Short distance

b)

Long distance

c)

Underwater

d)

Space

30.

OTDR is used for:

a)

Fiber fault detection

b)

Modulation

c)

Wavelength filtering

d)

Power boosting

31.

Speed of light in vacuum:

a)

3 × 10⁸ m/s

b)

3 × 10⁶ m/s

c)

3 × 10⁷ m/s

d)

None

32.

Ohm’s law is:

a)

V = IR

b)

P = VI

c)

I = V²

d)

None

33.

Energy stored in capacitor:

a)

½ CV²

b)

½ LI²

c)

VI

d)

None

34.

Kirchhoff’s Voltage Law (KVL) is based on:

a)

Energy conservation

b)

Power law

c)

Current conservation

d)

Frequency rule

35.

Unit of electric charge:

a)

Coulomb

b)

Joule

c)

Volt

d)

Henry

36.

Unit of magnetic flux:

a)

Weber

b)

Tesla

c)

Farad

d)

Ohm

37.

Derivative of sin(x):

a)

cos(x)

b)

tan(x)

c)

sec(x)

d)

csc(x)

38.

Integral of 1/x:

a)

ln(x)

b)

x²

c)

eˣ

d)

None

39.

Determinant of matrix |a b; c d|:

a)

ad - bc

b)

a + b + c + d

c)

ab + cd

d)

ad + bc

40.

Probability of head in a coin toss:

a)

0.5

b)

0.25

c)

1

d)

0.75

41.

The NOT gate output is:

a)

Complement of input

b)

Same as input

c)

Sum of inputs

d)

None

42.

AND gate output is 1 when:

a)

All inputs are 1

b)

One input is 1

c)

One input is 0

d)

None

43.

OR gate output is 1 when:

a)

Any input is 1

b)

All inputs are 0

c)

All inputs are 1

d)

None

44.

Flip-flop is a:

a)

Memory element

b)

Logic gate

c)

Sensor

d)

Filter

45.

Multiplexer selects:

a)

One input from many

b)

Many from one

c)

None

d)

All at once

46.

Demultiplexer performs:

a)

One input to many outputs

b)

Many to one

c)

Filtering

d)

Amplifying

47.

Microprocessor processes:

a)

Digital signals

b)

Analog signals

c)

Sound waves

d)

Light

48.

ADC converts:

a)

Analog → Digital

b)

Digital → Analog

c)

Binary → Hex

d)

None

49.

DAC converts:

a)

Digital → Analog

b)

Analog → Digital

c)

Binary → Decimal

d)

None

50.

The binary system base is:

a)

2

b)

4

c)

8

d)

10

51.

what is 2*2=

a)

4

b)

04

c)

4.0

d)

four

52.

What does TVK stands for?

a)

Thiruverkadu

b)

Tamilaga Vetri Kalagam

c)

Thiru Vi Ka

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