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- Question
What is the magnitude of the phase angle between the source voltage and current when a 100 mH inductor with an inductive reactance of 6 kΩ and a 1 kΩ resistor are in series with a source?
Options- A. 0.1°
- B. 9.0°
- C. 61.0°
- D. 81.0°
- Correct Answer
- 81.0°
- 1. An essential requirement of a feedback oscillator is a phase shift around the feedback loop of 360°.
Options- A. True
- B. False Discuss
- 2. In an n-type JFET, current will flow when a positive voltage is applied to the drain and a negative voltage is applied to the source.
Options- A. True
- B. False Discuss
- 3. Kirchhoff's current law for parallel circuits states that the:
Options- A. sum of all branch voltages equals zero
- B. total circuit resistance is less than the smallest branch resistor
- C. sum of currents into a junction is equal to the difference of all the branch currents
- D. sum of the total currents flowing out of a junction equals the sum of the total currents flowing into that junction Discuss
- 4. Which of the following statements is true?
Options- A. The voltage to which a capacitor is charged can change instantaneously.
- B. The current in a capacitive circuit takes time to change.
- C. A fully charged capacitor appears as a short to dc current.
- D. An uncharged capacitor appears as a short to an instantaneous change in current. Discuss
- 5. What is electromagnetism?
Options- A. the magnetic field generated around a conductor when a current passes through it
- B. the magnetic field generated in a conductor by an external voltage
- C. the voltage caused by a magnetic field in a conductor
- D. the current generated by an external magnetic field Discuss
- 6. What are the properties that determine the inductance of a coil?
Options- A. Length of wire, number of turns, type of core material, length of core
- B. Number of turns, type of wire, length of core, and cross-sectional area of core
- C. Type of core material, number of turns, cross-sectional area of core, and length of core
- D. Type of core material, type of wire, number of turns, and cross-sectional area of core Discuss
- 7. Base is the same as radix.
Options- A. True
- B. False Discuss
- 8.
What is the reactive power in the given circuit?
Options- A. 0 VAR
- B. 691 µVAR
- C. 44.23 mVAR
- D. 1.45 kVAR Discuss
- 9. If five equal resistors are connected in series with a 20 V source, and a current of 400 µA is measured, each resistor equals ___.
Options- A. 10 kΩ
- B. 50 kΩ
- C. 125 Ω
- D. 20 Ω Discuss
- 10. The polarity on the side of the resistor where current enters is ______. The polarity on the side of the resistor where current exits is ___________.
Options- A. positive, positive
- B. negative, negative
- C. negative, positive
- D. positive, negative Discuss
More questions
Correct Answer: True
Correct Answer: True
Correct Answer: sum of the total currents flowing out of a junction equals the sum of the total currents flowing into that junction
Correct Answer: An uncharged capacitor appears as a short to an instantaneous change in current.
Correct Answer: the magnetic field generated around a conductor when a current passes through it
Correct Answer: Type of core material, number of turns, cross-sectional area of core, and length of core
Correct Answer: True
Explanation:
In mathematical numeral systems, the base or radix for the simplest case is the number of unique digits, including zero, that a positional numeral system uses to represent numbers. For example, for the decimal system (the most common system in use today) the radix is ten, because it uses the ten digits from 0 through 9. In any numeral system, the base is written as "10". In a base ten numeral system, "10" represents the number ten; in a base two system, "10" represents the number two.
Correct Answer: 44.23 mVAR
Correct Answer: 10 kΩ
Correct Answer: negative, positive
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