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- Question
Find I1. 4I1 + 4I2 = 2
6I1 + 7I2 = 4
Options- A. 0.5 A
- B. 50 mA
- C. ?0.5 A
- D. ?50 mA
- Correct Answer
- ?0.5 A
- 1. Fourteen milliamperes can be expressed as
Options- A. 14 MA
- B. 14 µA
- C. 14 kA
- D. 14 mA Discuss
- 2. A series circuit consists of a 4.7 kΩ, a 12 kΩ, and a 2.2 kΩ resistor. The resistor that has the most voltage drop is
Options- A. the 12 kΩ
- B. the 2.2 kΩ
- C. the 4.7 kΩ
- D. impossible to determine from the given information Discuss
- 3. Point +4 on the complex plane is
Options- A. 4 units above the origin on the j axis
- B. 4 units below the origin on the j axis
- C. 4 units right of the origin on the real axis
- D. 4 units left of the origin on the real axis Discuss
- 4. Polyphase is characterized by two or more sinusoidal voltages, each having a different phase angle.
Options- A. True
- B. False Discuss
- 5. The first row of a certain determinant has the numbers 10 and 6. The second row has the numbers 3 and 5. The value of this determinant is
Options- A. 18
- B. 50
- C. 32
- D. ?32 Discuss
- 6. Inductance is indirectly proportional to the square of the number of turns, the permeability, and the cross-sectional area of the core.
Options- A. True
- B. False Discuss
- 7. A 470 Ω resistor and a 0.2 µF capacitor are in parallel across a 2.5 kHz ac source. The admittance, Y, in rectangular form, is
Options- A. 212 Ω
- B. 2.12 mS + j3.14 mS
- C. 3.14 mS + j2.12 mS
- D. 318.3 Ω Discuss
- 8. Find the current through R1 in the given circuit.
Options- A. 0.16 A
- B. 0.24 A
- C. 0.2 A
- D. 0.04 A Discuss
- 9. In a certain three-wire Y-connected generator, the phase voltages are 2 kV. The magnitudes of the line voltages are
Options- A. 2,000 V
- B. 6,000 V
- C. 666 V
- D. 3,464 V Discuss
- 10. A two-phase generator is connected to two 90 Ω load resistors. Each coil generates 120 V ac. A common neutral line exists. How much current flows through the common neutral line?
Options- A. 1.33 A
- B. 1.88 A
- C. 2.66 A
- D. 1.77 A Discuss
More questions
Correct Answer: 14 mA
Correct Answer: the 12 kΩ
Correct Answer: 4 units right of the origin on the real axis
Correct Answer: True
Correct Answer: 32
Correct Answer: False
Explanation:
Some factors that affect the inductance of a coil include:
1. The inductance is proportional to the square of the number of turns;
2. The inductance increases directly as the permeability of the core material increases;
3. The inductance increases directly as the cross-sectional area increases; and
4. The inductance decreases as its length increases.
1. The inductance is proportional to the square of the number of turns;
2. The inductance increases directly as the permeability of the core material increases;
3. The inductance increases directly as the cross-sectional area increases; and
4. The inductance decreases as its length increases.
Correct Answer: 2.12 mS + j3.14 mS
Correct Answer: 0.16 A
Correct Answer: 3,464 V
Correct Answer: 1.77 A
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