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- Question
The Memory Address Register
Options- A. is a hardware memory device which denotes the location of the current instruction being executed.
- B. is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.
- C. contains the address of the memory location that is to be read from or stored into.
- D. contains a copy of the designated memory location specified by the MAR after a "read" or the new contents of the memory prior to a "write".
- E. None of the above
- Correct Answer
- contains the address of the memory location that is to be read from or stored into.
- 1. The peak value of a sine waveform is:
Options- A. the amplitude at 70.7% of the maximum value
- B. the amplitude at 90% of the maximum value
- C. the amplitude at 1.41 times the maximum value
- D. the maximum positive or negative value
- E. None of the above Discuss
- 2. Which one of the following phrasers best describes flux density?
Options- A. The concentration of lines of magnetic force
- B. The rate of change of the number of lines of magnetic force
- C. The opposition to a build-up of magnetic fields
- D. The force that maintains lines of force
- E. None of the above Discuss
- 3. Assuming 100% efficiency, what is the power being consumed at the secondary winding of the transformer described in question 91?
Options- A. 200 W
- B. 1000 W
- C. 20 W
- D. 100 W
- E. None of the above Discuss
- 4. Which one of the following statements is true?
Options- A. Capacitive reactance is at a minimum for dc source voltages
- B. Capacitive reactance decreases as the operating frequency increases
- C. There is no meaningful relationship between capacitive reactance and operating frequency
- D. Capacitive reactance increases as the operating frequency increases
- E. None of the above Discuss
- 5. When operating above its resonant frequency, a series RLC circuit has the characteristics of a:
Options- A. series RL circuit
- B. series RC circuit
- C. series RLC circuit operated below its resonant frequency
- D. purely resistive circuit
- E. None of the above Discuss
- 6. Which one of the following kinds of materials has the highest permeability?
Options- A. A diamagnetic material
- B. A ferromagnetic material
- C. A paramagnetic material
- D. All of the above
- E. None of the above Discuss
- 7. Current is
Options- A. The flow of charged particles through a material
- B. An imbalance of electrical charges
- C. The force that causes electrons to flow
- D. The number of free electrons in an atom
- E. None of the above Discuss
- 8. Which one of the following phrases most accurately describes a purely capacitive circuit?
Options- A. Resistances provide the only opposition to current flow
- B. Capacitive reactance provides the only opposition to current flow
- C. The ac voltage leads the current by 90 degree
- D. Combinations of resistance and capacitive reactance provide any opposition to current flow
- E. None of the above Discuss
- 9. Which one of the following equations most directly determines the power dissipation of a resistance when you know the power dissipation of a resistance when you know the voltage drop and current?
Options- A. P = IE
- B. P = E2/R
- C. P = I2R
- D. I = P/E
- E. None of the above Discuss
- 10. What is the power dissipation of a resistance that has 24 V dropped across it and 0.25 A flowing through it?
Options- A. 3 W
- B. 6 W
- C. 64 W
- D. 122 W
- E. None of the above Discuss
More questions
Correct Answer: the maximum positive or negative value
Correct Answer: The concentration of lines of magnetic force
Correct Answer: 200 W
Correct Answer: Capacitive reactance decreases as the operating frequency increases
Correct Answer: series RL circuit
Correct Answer: A ferromagnetic material
Correct Answer: The flow of charged particles through a material
Correct Answer: Capacitive reactance provides the only opposition to current flow
Correct Answer: P = IE
Correct Answer: 6 W
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