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- Question
A basic capacitor is composed of:
Options- A. two conductors separated by a dielectric
- B. two dielectrics separated by a conductor
- C. two coils separated by a dielectric
- D. two coils separated by a conductor
- E. None of the above
- Correct Answer
- two conductors separated by a dielectric
- 1. One henry of inductance is defined as:
Options- A. the amount of counter emf required to reduce a current to 1 A
- B. the amount of inductance required for generating 1 V of counter emf when the current changes at the rate of 1 A per second
- C. the amount of inductance required to change the frequency of a current by 1 Hz
- D. the number of turns of wire in an inductor multiplied by the amount of current flowing through it
- E. None of the above Discuss
- 2. The nucleus of the copper atom contains how many protons?
Options- A. 1
- B. 4
- C. 18
- D. 29
- E. None of the above Discuss
- 3. What is the barrier potential of a silicon diode at room temperature?
Options- A. 0.7V
- B. 0.3V
- C. 1 V
- D. 2 m V per degree Celsius
- E. None of the above Discuss
- 4. At room temperature a conductor has low many holes?
Options- A. Same number as free electrons
- B. many
- C. Only those produced by thermal energy
- D. less than the free electrons
- E. None of the above Discuss
- 5. A device that converts mechanical pressure to electrical energy is called a:
Options- A. piezoelectric device
- B. solar cell
- C. photodiode
- D. nicad cell
- E. None of the above Discuss
- 6. The transistor has a collector current of 2 mA. If the current gain is 135, what is the base current?
Options- A. 14.8 ľA
- B. 10.3 ľA
- C. 7.8 ľA
- D. 7.75 ľA
- E. None of the above Discuss
- 7. Which one of. the following phrases most accurately describes the nature of a pulsating dc voltage?
Options- A. The voltage remains at one polarity and at a steady level
- B. The voltage remains at one polarity but changes value periodically
- C. The voltage causes current to flow in two directions at the same time
- D. The voltage reverses polarity periodically
- E. None of the above Discuss
- 8. What is the impedance of a circuit composed of a 100 ohm resistor connected in parallel with an inductor that has a reactance of 200 W?
Options- A. 77.7 ohm
- B. 89.3 ohm
- C. 88.8 ohm
- D. 224 ohm
- E. None of the above Discuss
- 9. When a parallel RLC circuit is operating at its resonant frequency:
Options- A. capacitive reactance is greater than the inductive reactance
- B. inductive reactance is greater than the capacitive reactance
- C. inductive reactance is equal to the capacitive reactance
- D. the difference between inductive and capacitive reactance is equal to the resistance
- E. None of the above Discuss
- 10. Current and voltage are said to be in phase when:
Options- A. their waveforms are both ac or both dc
- B. they have the same amplitude and frequency
- C. their waveforms cross through zero and reach positive and negative peaks at the same time
- D. All of the above
- E. None of the above Discuss
Electronic Principles problems
Search Results
Correct Answer: the amount of inductance required for generating 1 V of counter emf when the current changes at the rate of 1 A per second
Correct Answer: 29
Correct Answer: 0.7V
Correct Answer: Same number as free electrons
Correct Answer: piezoelectric device
Correct Answer: 14.8 ľA
Correct Answer: The voltage remains at one polarity but changes value periodically
Correct Answer: 89.3 ohm
Correct Answer: inductive reactance is equal to the capacitive reactance
Correct Answer: their waveforms cross through zero and reach positive and negative peaks at the same time
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