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- Question
In assigning the direction of branch currents,
Options- A. the directions are critical
- B. the directions are not critical
- C. they must point into a node
- D. they must point out of a node
- Correct Answer
- the directions are not critical
- 1. A 2 mH, a 3.3 mH, and a 0.2 mH inductor are connected in series. The total inductance is
Options- A. 55 mH
- B. less than 0.2 mH
- C. less than 5.5 mH
- D. 5.5 mH Discuss
- 2. Five inductors are connected in series. The lowest value is 8 ?H. If the value of each inductor is twice that of the preceding one, and if the inductors are connected in order of ascending values, the total inductance is
Options- A. 8 H
- B. 32 ?H
- C. 64 ?H
- D. 248 ?H Discuss
- 3. The parallel combination of a 6.8 kΩ resistor and a 10 kΩ resistor is in series with the parallel combination of a 2.2 kΩ resistor and a 1 kΩ resistor. A 100 V source is connected across the circuit. The resistor(s) with the greatest voltage drop is (are)
Options- A. 6.8 kΩ
- B. 2.2 kΩ
- C. 6.8 kΩ and 10 kΩ
- D. 2.2 kΩ and 1 kΩ Discuss
- 4. A certain series circuit consists of a 1/8 W resistor, a 1/4 W resistor, and a 1/2 W resistor. The total resistance is 1200 Ω. If each resistor is operating in the circuit at its maximum power dissipation, total current flow is
Options- A. 27 mA
- B. 2.7 mA
- C. 19 mA
- D. 190 mA Discuss
- 5. A 240 µH inductor is equivalent to a
Options- A. 0.240 mH inductor
- B. 0.000240 mH inductor
- C. 240 mH inductor
- D. 240 H inductor Discuss
- 6. Referring to the given circuit, find ZTH if VS is 18∠0° V.
Options- A. 9.82 ∠?51.3° kΩ
- B. 9.38∠?51.3° kΩ
- C. 180 ∠?38.3° kΩ
- D. 19.2 ∠?38.3° kΩ Discuss
- 7. In a certain three-branch parallel circuit, R1 has 12 mA through it, R2 has 15 mA through it, and R3 has 25 mA through it. After measuring a total of 27 mA, you can say that
Options- A. R3 is open
- B. R1 is open
- C. R2 is open
- D. the circuit is operating properly Discuss
- 8. The following currents are measured in the same direction in a three-branch parallel circuit: 200 mA, 340 mA, and 700 mA. The value of the current into the junction of these branches is
Options- A. 200 mA
- B. 540 mA
- C. 1.24 A
- D. 900 mA Discuss
- 9. The current through a flashlight bulb is 40 mA and the total battery voltage is 4.5 V. The resistance of the bulb is approximately
Options- A. 112 Ω
- B. 11.2 Ω
- C. 1.2 Ω
- D. 18 Ω Discuss
- 10. An electric heater draws 3.5 A from a 110 V source. The resistance of the heating element is approximately
Options- A. 385 Ω
- B. 38.5 Ω
- C. 3.1 Ω
- D. 31 Ω Discuss
More questions
Correct Answer: 5.5 mH
Correct Answer: 248 ?H
Correct Answer: 6.8 kΩ and 10 kΩ
Correct Answer: 27 mA
Explanation:
Total P = P1 + P2 + P3 = 7/8w.
P = I2R.
I = sqrt (P/R)
Now, P = 7/8w, R = 1200 ohm.
Therefore,
I= sqrt ( (7/8)/1200 ) = 0.0270030862 = 27 mA.
P = I2R.
I = sqrt (P/R)
Now, P = 7/8w, R = 1200 ohm.
Therefore,
I= sqrt ( (7/8)/1200 ) = 0.0270030862 = 27 mA.
Correct Answer: 0.240 mH inductor
Correct Answer: 9.38∠?51.3° kΩ
Correct Answer: R3 is open
Correct Answer: 1.24 A
Correct Answer: 112 Ω
Correct Answer: 31 Ω
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