Introduction to Electronics Week 7 Quiz Answer

Introduction to Electronics

Week 7 Quiz Answer

In this article i am gone to share Coursera Course Introduction to Electronics Week 7 Quiz Answer with you..

Week 7 Quiz

Question 1)

The dc bias circuit for a common emitter amplifier is shown in the figure. In the circuit,

VCC = 12V, RB2 = 105.8kΩ, VC = 6V, VE = 3V, VB = 3.65V, IE = 2mA, and B = 75.

Answer: 1.50

Question 2)

For the circuit of question 1,

Solve for the collector resistor RC. (In kilo ohms to two decimal places)

Answer: 3.04

Question 3)

For the circuit of question 1,

Solve for the base bias resistor RB1. (In kilo ohms to two decimal places)

Answer: 69.36

Question 4)

In the CE amplifier shown,

VCC = 12V, RB1 = 15kΩ, RB2 = 51kΩ, RC = 8kΩ, RE1 = 1.7kΩ, RE2 = 150Ω, RL = 20kΩ, and B=75. Assume VBE = 0.65V.

Solve for the collector current in milliamps to two decimal places.

Answer: 1.11

Question 5)

For the CE amplifier of question 4, solve for the midband gain to one decimal place.

Answer: -35.06

Question 6)

In the BJT CE amplifier of question 4, as the emitter resistor RE2 is increased,

the midband gain increases and the dc collector current increases.
the midband gain increases and the dc collector current decreases.
the midband gain decreases and the dc collector current remains constant.
the midband gain decreases and the bias point of the transistor changes.

Question 7)

Select all of the below statements that are true.

A CE amplifier may behave as an attenuator for signals at some frequencies.

As the collector current of a particular biased BJT is decreased, its transconductance decreases.

The overdrive factor used when designing a BJT switch is to ensure that the BJT remains in cutoff no matter what load is placed on the switch.

The saturation current parameter of a BJT may be determined from a point on its transfer characteristic curve.

A curve tracer may be used to measure the collector current of a BJT for different values of VCE as the base current is held constant.

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