ECE Questions

For any kind of engineering based entrance exam and interview, some top ECE Questions and Answers are presented here. With the help of Electronics & Communication Engineering interview questions and answer, aspirants can easily prepare for exam or interview. Check now Electronics & Communication Engineering MCQ given below.

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ECE Questions And Answers:

ECE Questions And Answers will deepen your knowledge and skills regarding the basic concepts and theories of Electronics and Communication Engineering. Those preparing for competitive exam may also refer these Electronics and Communication Engineering Questions and Answers to score well.

ECE Questions

Ques1: Diamond is a paramagnetic material.

1. True
2. False

Answer: Option 2

Ques2: Which capacitor-store higher amount of energy?

1. Air capacitor
2. Paper capacitor
3. Mica capacitor
4. Plastic film capacitor

Answer: Option 3

Ques3: In paramagnetic materials

1. permanent magnetic dipoles exist but the interaction between neighbouring dipoles is negligible
2. permanent magnetic dipole do not exist
3. permanent magnetic dipoles exist and the interaction between neighbouring dipoles is very strong
4. permanent magnetic dipole moment may or may not exist

Answer: Option 1

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Ques4: At room temperature the current in an intrinsic semiconductor is due to

1. holes
2. electrons
3. ions
4. holes and electrons

Answer: Option 4

Ques5: Work function is the maximum energy required by the fastest electron at 0 K to escape from the metal surface.

1. True
2. False

Answer: Option 2

Ques6: The most commonly used semiconductor material is

1. silicon
2. germanium
3. mixture of silicon and germanium
4. none of the above

Answer: Option 1

Ques7: In which of these is reverse recovery time nearly zero?

1. Zener diode
2. Tunnel diode
3. Schottky diode
4. PIN diode

Answer: Option 3

Ques8: A transistor has a current gain of 0.99 in the CB mode. Its current gain in the CC mode is

1. 100
2. 99
3. 01
4. 99

Answer: Option 1

Ques9: Henry is equivalent to

1. Volts/Ampere
2. Weber/Volt
3. Weber/Ampere
4. Weber/Ampere2

Answer: Option 3

Ques10: For a transmission line open circuit and short circuit impedances are 20 Ω and 5 Ω. Then characteristic impedance is

1. 100 Ω
2. 50 Ω
3. 25 Ω
4. 10 Ω

Answer: Option 4

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Ques11: ZL = 200 Ω and it is desired that Zi = 50 Ω The quarter wave transformer should have a characteristic impedance of

1. 100 Ω
2. 40 Ω
3. 10000 Ω
4. 4 Ω

Answer: Option 1

Ques12: The function f(x – vot) represent which of the following?

1. A stationary wave
2. A wave motion in forward direction
3. A wave motion in reverse direction
4. None of the above

Answer: Option 2

Ques13: The input impedance of short-circuited line of length l where λ/4 < l < λ/2, is

1. resistive
2. inductive
3. capacitive
4. none of the above

Answer: Option 3

Ques14: Find the radiation resistance of an antenna of length λ/10 meter?

1. 8 Ω
2. 780 Ω
3. 8 Ω
4. 78 Ω

Answer: Option 3

Ques15: A cycloconverter can be

1. step down
2. step up
3. step down or step up
4. none of the above

Answer: Option 3

Ques16: The amount of dielectric heating is inversely proportional to frequency.

1. True
2. False

Answer: Option 2

Ques17: The noise generated by a resistor depends upon

1. its resistance value
2. its operating temperature
3. both its resistance value and operating temperature
4. none of the above

Answer: Option 2

Ques18: In a superheterodyne receiver

1. the IF stage has better selectivity than RF stage
2. the RF stage has better selectivity than IF stage
3. the RF stage has same selectivity than IF stage
4. none of the above

Answer: Option 1

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Ques19: The function of an AM detector circuit is to

1. rectify the input signal
2. discard the carrier
3. provide audio signal
4. all of the above

Answer: Option 4

Ques20: Which of the following should be used in order to prevent overloading or the last IF amplifier in a receiver?

1. Variable selectivity
2. Variable sensitivity
3. Double conversion
4. Squelch

Answer: Option 2

Ques21: Most popular IF for receivers tuning to 540 to 1650 kHz is

1. 433 kHz
2. 455 kHz
3. 545 kHz
4. 555 kHz

Answer: Option 2

Ques22: The velocity factor of a transmission line depends on

1. temperature
2. skin effect
3. relative permittivity of dielectric
4. none of the above

Answer: Option 3

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Ques23: In a klystron amplifier the input cavity is called

1. buncher
2. catcher
3. Pierce gun
4. collector

Answer: Option 1

Ques24: The reflection coefficient on a line is 0.2 ∠45°. The SWR is

1. 8
2. 1
3. 2
4. 5

Answer: Option 4

Ques25: The first geostationary satellite launched in 1965 was called

1. ANIK
2. EARLY BIRD (Intelsat-I)
3. WESTAR
4. MOLNIYA

Answer: Option 2

Ques26: The present total cost per watt of power generation in geosynchronous orbit is nearly Rs.

1. 20
2. 50
3. 100
4. 5

Answer: Option 1

Ques27: Which of the following can be accessed only sequentially?

1. Floppy disk
2. Hard disk
3. Magnetic tape
4. ROM

Answer: Option 3

Ques28: MICR stands for

1. Magnetic Ink Chart Receipt
2. Magnetic Ink Character Recognition
3. Magnetic Ink Chart Recognition
4. Magnetic Ink Character Receipt

Answer: Option 2

Ques29: 8085 has 6 sign flags.

1. True
2. False

Answer: Option 2

Ques30: Binary number 1101.101 is equivalent to decimal number?

1. 5
2. 75
3. 625
4. 875

Answer: Option 3

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About Electronics & Communication Engineering:

Electronics & Communication Engineering refers to study of electronic devices, circuits, communication equipment’s like transmitter, receiver, integrated circuits (IC). In addition to this, it also lay emphasize on basic electronics, analog and digital transmission & reception of data. To gain more details about Electronics and Communication Engineering Questions and Answers, have a glance on above of page equipped by team of recruitmentresult.com.

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