Quiz for Transistors

Q1: What is a transistor?

A. A device used to amplify or switch electronic signals B. A device that stores energy C. A device that emits light D. A device that converts AC to DC

Q2: Which materials are used to make a transistor?

A. Semiconductors like silicon and germanium B. Metals like copper and aluminum C. Insulators like glass D. Superconductors

Q3: What are the three terminals of a transistor?

A. Emitter, Base, Collector B. Anode, Cathode, Gate C. Source, Drain, Gate D. Input, Output, Ground

Q4: What type of device is a Bipolar Junction Transistor (BJT)?

A. Current-controlled device B. Voltage-controlled device C. Power supply D. Energy storage device

Q5: In an NPN transistor, which charge carriers are majority in the emitter?

A. Electrons B. Holes C. Protons D. Neutrons

Q6: What happens when the base current in a BJT increases?

A. Collector current increases B. Collector current decreases C. Emitter current decreases D. Transistor stops working

Q7: What is the main function of the base in a transistor?

A. Control the flow of current between emitter and collector B. Supply power to the transistor C. Emit light D. Store charge

Q8: What is the typical use of transistors in electronics?

A. Amplifiers and switches B. Energy storage C. Voltage regulation D. Light emission

Q9: Which of the following is NOT a type of transistor?

A. Resistor transistor B. NPN transistor C. PNP transistor D. Field Effect Transistor (FET)

Q10: What distinguishes a PNP transistor from an NPN transistor?

A. Majority carriers are holes in PNP and electrons in NPN B. Voltage ratings C. Power ratings D. Size

Q11: What does the term “gain” in a transistor refer to?

A. Ratio of output current to input current B. Power rating C. Voltage rating D. Energy consumption

Q12: What happens if the transistor is in cutoff region?

A. No current flows between collector and emitter B. Maximum current flows C. Oscillates D. Emits light

Q13: What happens in the saturation region of a transistor?

A. Maximum current flows through collector to emitter B. No current flows C. Transistor amplifies voltage D. Device stores charge

Q14: What type of transistor is controlled by voltage?

A. Field Effect Transistor (FET) B. Bipolar Junction Transistor (BJT) C. Diode D. Zener diode

Q15: Which terminal of a FET acts like a gate?

A. Gate B. Base C. Emitter D. Collector

Q16: Which transistor is better for high-frequency applications?

A. FET B. BJT C. Diode D. Zener diode

Q17: What is the main advantage of FETs over BJTs?

A. Higher input impedance B. Lower cost C. Higher power D. Smaller size

Q18: What is the typical application of a transistor as a switch?

A. Digital logic circuits B. Power generation C. Signal storage D. Temperature control

Q19: What is the unit of current gain (β) in a transistor?

A. Dimensionless B. Ampere C. Volt D. Ohm