33 Questions
Who discovered the electron in 1898?
Thomson
Which device was unreliable and consumed a lot of power according to the given text?
Triode in vacuum tube
Who proposed the basic principle behind the MOS field-effect transistor?
Julius Edgar Lilienfield
Who was the team leader of the solid state department at Bell Labs?
Bill Shockley
Which company received a license from Bell Labs to build transistors?
Sony
In what year did Sony receive a license from Bell Labs to build transistors?
1950
Who founded Shockley Semiconductor?
Bill Shockley
Which physicist patented the field effect transistor in 1934?
Oskar Heil
What is a transistor?
An electronic device made of a semiconductor that can act as an insulator and a conductor
Which invention was probably the most important of the 20th Century, according to Ira Flatow?
Transistor
What is the main function of a transistor?
To switch or amplify signals
Which invention replaced vacuum tubes?
Transistors
Who discovered Rectification crystals that can conduct current in only one direction under certain conditions?
Ferdinand Braun
What did John Ambrose Fleming develop?
Vacuum Tube
What is the purpose of biasing in transistors?
To set the operating point for amplifying the AC signal
What is the function of a DC load line in a transistor circuit?
It shows the range of operation between cut-off and saturation points
In a transistor circuit, what is the significance of the quiescent point?
It marks the operating point of the transistor without time varying sources
What is the relation between input/output phase in Common Base transistor configuration?
180°
Which type of transistor configuration exhibits high voltage gain?
Common Emitter
What type of DC biasing circuit uses a voltage divider?
Voltage divider bias circuit
What is the expression for base current in a fixed-bias circuit?
$IB = \frac{V_{CC} - V_{BE}}{RB}$
What happens when a transistor is operating in saturation?
Collector current is at its maximum value
Which type of transistor configuration exhibits low input impedance?
Common Base
In a fixed bias configuration, the Q-point is the operating point where:
the value of IB sets the values of VCE and IC
In the emitter-stabilized bias circuit, adding a resistor (RE) to the emitter circuit stabilizes the bias circuit by:
improving the stability of the transistor
The collector-emitter loop in the improved biased stability circuit can be described by the equation:
VCE = VCC – IC (RC + RE)
The saturation level in a transistor can be determined from the endpoints of the load line where:
IC = 0 mA and VCE = 0 V
In the voltage divider bias configuration, the currents and voltages are nearly independent of variations in b, which refers to:
transistor gain
The approximate analysis for the voltage divider bias configuration is valid when:
$IB << 10R_2$
In a DC bias with voltage feedback, adding a feedback path from collector to base improves the stability of the bias circuit by:
making the Q-point independent of transistor beta, b
The load line analysis for transistor saturation level determines the saturation endpoints as:
$VCE = 0V$ and $IC = VCC / RC$
"Circuit Values Affect the Q-Point more" implies that changes in circuit values like resistors have a greater impact on:
$IC$
The base-emitter loop in the emitter-stabilized bias circuit can be described by the equation:
$I_B = \frac{VCC - VBE}{RB + (b + 1)RE}$
Test your knowledge of transistors with this quiz! Learn about the basic components of a transistor and its role as a key electronic device in modern technology.
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