Alternating Current vs Direct Current Questions and Answers
Understanding the difference between Alternating Current (AC) and Direct Current (DC) is essential for every electronics engineer. This section on AC vs DC questions with answers focuses on basic principles, applications, and problem-solving in electronics aptitude questions and answers. Exams like SSC JE, DRDO, and GATE often include conceptual and numerical problems comparing AC and DC systems. Practicing these aptitude questions with solutions PDF improves clarity on circuit behavior, power transmission, and frequency analysis — crucial for technical interviews and competitive tests.
Understand differences between AC and DC electrical supply. Also look into circuits and resonance and parallel circuits for related practical insights.
Alternating Current vs Direct Current
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17 questions
11. A test equipment item that has the ability to produce either square, triangular, or sawtooth waveforms is called:
- a function generator
- a radio frequency generator
- an audio frequency generator
- a frequency meter or counter
12. What does the CRT oscilloscope display?
- voltage and period
- current and frequency
- rms voltage and current
- frequency and voltage
13. Power companies supply ac, not dc, because:
- it is easier to transmit ac
- there is no longer a need for dc
- dc is more dangerous
- there are not enough batteries
14. If a waveform period is determined to be 10 microseconds in duration, what is the frequency of the signal?
- 100 Hz
- 1000 Hz
- 10 kHz
- 100 kHz
15. The phase difference between sine waves of different frequencies is:
- equal to their frequency differences
- the difference in their fixed time displacement
- the same throughout time
- constantly changing
16. If a sine wave signal is 100 mV peak-to-peak, how many volts would be measured by a voltmeter?
- 14.14 mV
- 35.4 mV
- 63.7 mV
- 70.7 mV