Electronic Devices and Circuit Theory-Communications Questions and Answers
Understanding Electronic Devices and Circuit Theory is crucial for students of electronics and communication engineering preparing for exams like GATE, BEL, DRDO, and ISRO. This section offers comprehensive aptitude questions and answers with explanations covering diodes, transistors, amplifiers, and circuit behavior under different conditions. Solving these practice problems enhances your conceptual clarity and analytical thinking. The questions are designed to match real exam standards, with step-by-step solutions for easy understanding. Whether you’re preparing for a core electronics placement or government technical test, practicing these electronics aptitude questions with solutions PDF will give you the confidence to excel in your next exam.
Electronic Devices and Circuit Theory-Communications
11. The mixer takes the RF signal along with the audio signal to produce the IF signal.
- TRUE
- FALSE
12. A balanced modulator is used in standard AM to obtain the sum and difference frequencies.
- TRUE
- FALSE
14. Selectivity in a receiver is provided by the resonant circuits of the IF section.
- TRUE
- FALSE
15. An AM signal is made up of a carrier, an upper-side frequency, and a lower-side frequency.
- TRUE
- FALSE
16. Frequency modulation is achieved by varying the frequency of an oscillator with a modulating signal.
- TRUE
- FALSE
17. Amplitude modulation is the process of varying the radio frequency with the modulating frequency.
- TRUE
- FALSE