What electrical conversion is performed by a transistor__________________?
Show answer Hide answer
Answer: A. c. power into a.c. power
Explanation
Transistors modulate DC supply power using small AC input signals to create output variations. The energy delivered to the load originates directly from the connected DC power source. Output signals contain alternating current waveforms powered by direct current biasing energy. Active semiconductor devices control power flow rather than creating electrical energy independently. Direct current supplies provide the necessary quiescent energy for proper transistor operation. Alternating current signals represent time-varying voltages superimposed on steady DC operating levels.
Radio frequency transmitters convert DC battery power into high frequency AC broadcast signals. Audio amplifiers transform steady DC supply energy into audible AC speaker output signals. Power conversion efficiency determines how well amplifiers utilize direct current input resources. AC power into DC power describes the fundamental operation performed by semiconductor rectifiers. High resistance into low resistance refers to impedance transformation rather than power conversion. None of the above fails because the correct option accurately describes power conversion.
- Subject
- Engineering
- Category
- Electrical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. A voltage divider consists of two 12 kΩ series resistors. Which load resistor will exert maximum impact on output voltage?
Show answer Hide answer
Answer: D. 12 kΩ
A parallel load resistor draws current and lowers the effective branch resistance value. Maximum voltage drop occurs when the load resistance equals the internal divider resistance. Equal resistance splitting causes the...
Q2. A compact coil rests inside a larger coaxial horizontal coil carrying opposing currents. The larger coil experiences______________?
Show answer Hide answer
Answer: D. No resultant force
Coaxial coils carrying opposing currents create symmetrical magnetic field forces that cancel each other out completely. Equal and opposite forces acting along the common axis produce no net translational force on the co...
Q3. What components make up a single-stage transistor amplifier alongside its associated circuitry______________?
Show answer Hide answer
Answer: B. One transistor
A single-stage amplifier relies on one active transistor to boost signal strength. All necessary biasing networks surround this solitary amplifying device on the board. Additional amplifying stages would classify the ele...
Q4. Why does a transistor amplifier exhibit a high output impedance______________?
Show answer Hide answer
Answer: B. Collector has reverse bias
Reverse bias creates a high resistance barrier at the collector-emitter junction boundary. High junction resistance directly translates into a high output impedance at the collector. Collector terminal characteristics di...
Q5. By what alternative name is a class A power amplifier sometimes known______________amplifier?
Show answer Hide answer
Answer: B. Single-ended
Class A power amplifiers typically utilize a single active output device operating over the entire cycle. Using one amplifying transistor for the entire signal waveform is why it is called single-ended. Single-ended conf...
Q6. What type of temperature coefficient of resistance does a semiconductor possess______________?
Show answer Hide answer
Answer: C. Negative
Thermal energy releases more charge carriers in semiconductors as temperature rises steadily. Increased carrier availability lowers the internal electrical resistance of semiconductor materials. Negative temperature coef...