Transistor Types and Basic Operation Quiz Practice…

Q: What are the three terminals of a Bipolar Junction Transistor (BJT)?

Base, Emitter, Collector — A BJT is a current-controlled device consisting of the Base, Emitter, and Collector terminals.

Q: Which of the following is a field-effect transistor (FET) terminal?

Drain — FETs (like MOSFETs) are voltage-controlled devices with Source, Gate, and Drain terminals.

Q: In an NPN transistor, which terminal is the main carrier of current into the device from the external circuit when active?

Collector — In an NPN transistor, current flows into the Collector and out through the Emitter.

Q: What is the primary difference between a BJT and a MOSFET?

BJT is current-controlled; MOSFET is voltage-controlled — BJTs operate based on input current at the base, while MOSFETs are controlled by the electric field (voltage) at the gate.

Q: What does 'BJT' stand for?

Bipolar Junction Transistor — BJT stands for Bipolar Junction Transistor, referring to the use of both electrons and holes as charge carriers.

Q: What is the typical state of a transistor when used as a switch in the 'OFF' position?

Cut-off — In the cut-off region, the transistor does not conduct current, acting as an open switch.

Q: What is the typical state of a transistor when used as a switch in the 'ON' position?

Saturation — In saturation, the transistor allows maximum current flow, acting as a closed switch.

Q: In a common-emitter configuration, the input signal is typically applied to which terminal?

Base — In a common-emitter BJT circuit, the base acts as the input terminal for the signal.

Q: Which type of transistor is characterized by a very high input impedance due to an insulating layer?

MOSFET — MOSFETs (Metal-Oxide-Semiconductor FETs) have a gate insulated by an oxide layer, resulting in high input impedance.

Q: What is the arrow direction on the emitter of an NPN transistor symbol?

Pointing outward — The mnemonic 'NPN' stands for 'Not Pointing iN', meaning the emitter arrow points outward.

Question 1 of 10

What are the three terminals of a Bipolar Junction Transistor (BJT)?

A BJT is a current-controlled device consisting of the Base, Emitter, and Collector terminals.

Question 2 of 10

Which of the following is a field-effect transistor (FET) terminal?

FETs (like MOSFETs) are voltage-controlled devices with Source, Gate, and Drain terminals.

Question 3 of 10

In an NPN transistor, which terminal is the main carrier of current into the device from the external circuit when active?

In an NPN transistor, current flows into the Collector and out through the Emitter.

Question 4 of 10

What is the primary difference between a BJT and a MOSFET?

BJTs operate based on input current at the base, while MOSFETs are controlled by the electric field (voltage) at the gate.

Question 5 of 10

What does 'BJT' stand for?

BJT stands for Bipolar Junction Transistor, referring to the use of both electrons and holes as charge carriers.

Question 6 of 10

What is the typical state of a transistor when used as a switch in the 'OFF' position?

In the cut-off region, the transistor does not conduct current, acting as an open switch.

Question 7 of 10

What is the typical state of a transistor when used as a switch in the 'ON' position?

In saturation, the transistor allows maximum current flow, acting as a closed switch.

Question 8 of 10

In a common-emitter configuration, the input signal is typically applied to which terminal?

In a common-emitter BJT circuit, the base acts as the input terminal for the signal.

Question 9 of 10

Which type of transistor is characterized by a very high input impedance due to an insulating layer?

MOSFETs (Metal-Oxide-Semiconductor FETs) have a gate insulated by an oxide layer, resulting in high input impedance.

Question 10 of 10

What is the arrow direction on the emitter of an NPN transistor symbol?

The mnemonic 'NPN' stands for 'Not Pointing iN', meaning the emitter arrow points outward.

Transistor Types and Basic Operation Quiz