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Electronics and Communication Engineering (ECE) Exam  >  Electronics and Communication Engineering (ECE) Tests  >  Test: Limits of Operation - Electronics and Communication Engineering (ECE) MCQ

Test: Limits of Operation - Electronics and Communication Engineering (ECE) MCQ


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10 Questions MCQ Test - Test: Limits of Operation

Test: Limits of Operation for Electronics and Communication Engineering (ECE) 2024 is part of Electronics and Communication Engineering (ECE) preparation. The Test: Limits of Operation questions and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus.The Test: Limits of Operation MCQs are made for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Limits of Operation below.
Solutions of Test: Limits of Operation questions in English are available as part of our course for Electronics and Communication Engineering (ECE) & Test: Limits of Operation solutions in Hindi for Electronics and Communication Engineering (ECE) course. Download more important topics, notes, lectures and mock test series for Electronics and Communication Engineering (ECE) Exam by signing up for free. Attempt Test: Limits of Operation | 10 questions in 10 minutes | Mock test for Electronics and Communication Engineering (ECE) preparation | Free important questions MCQ to study for Electronics and Communication Engineering (ECE) Exam | Download free PDF with solutions
Test: Limits of Operation - Question 1
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For a BJT, what is typically the shape of the power dissipation curve, if it’s plotted on the output characterisics?

Detailed Solution for Test: Limits of Operation - Question 1

Power Dissipation in a BJT is given by P=VCE.IC. This is in the form of k=xy which is the equation of a hyperbola.

Test: Limits of Operation - Question 2
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What is the region on the output characteristics below IC = ICEO line called?

Detailed Solution for Test: Limits of Operation - Question 2

The region below IC = ICEO is called the cutoff region.

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Test: Limits of Operation - Question 3
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What is the region on the output characteristics for VCE < VCEsat called?

Detailed Solution for Test: Limits of Operation - Question 3

The region below VCE < VCEsat is called the saturation region.

Test: Limits of Operation - Question 4
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In a BJT amplifier the power gain from base to collector is 4000. The power gain in dB is
Detailed Solution for Test: Limits of Operation - Question 4

Gain in dB = 10 log (4000).

Test: Limits of Operation - Question 5
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Given that the collector power dissipation is 300 mW, what is the value of collector current for the collector to emitter voltage = 12 V?
Detailed Solution for Test: Limits of Operation - Question 5

 P=VCE.IC => 300mW = (12V)IC => IC=300/12 mA = 25 mA.

Test: Limits of Operation - Question 6
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 Given that the collector power dissipation is 300 mW, what is the value of collector to emitter voltage for collector current = 50 mA?
Detailed Solution for Test: Limits of Operation - Question 6

 P=VCE.IC => 300mW = VCE(50 mA) => VCE = 300/50 = 6 V.

Test: Limits of Operation - Question 7
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From the given curve tracer response, what is the value of β for IC = 7 mA and VCE = 5 V?
Detailed Solution for Test: Limits of Operation - Question 7

From the curve, we get change in IC = (8.2-6.4) mA and change in IB = 10 uA. Hence, /beta; = (1.8/0.01) = 180.

Test: Limits of Operation - Question 8
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If the positive lead of a DMM, with the mode set to ohmmeter is connected to the base and the negative lead to the emitter and a low resistance reading is obtained, then what is the type of transistor that is being tested?
Detailed Solution for Test: Limits of Operation - Question 8

If the positive lead of a DMM, with the mode set to ohmmeter is connected to the base and the negative lead to the emitter and a low resistance reading is obtained, then what is the type of transistor that is being tested is npn.

Test: Limits of Operation - Question 9
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If the positive lead of a DMM, with the mode set to ohmmeter is connected to the base and the negative lead to the emitter and a high resistance reading is obtained, then what is the type of transistor that is being tested?
Detailed Solution for Test: Limits of Operation - Question 9

If the positive lead of a DMM, with the mode set to ohmmeter is connected to the base and the negative lead to the emitter and a low resistance reading is obtained, then what is the type of transistor that is being tested is npn.

Test: Limits of Operation - Question 10
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For the given transistor, what is the correct sequence of the pins from left to right?
Detailed Solution for Test: Limits of Operation - Question 10

 With the curved side facing away the correct lead sequence is base, collector, emitter.

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