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- Question
The formula to find I when the values of V and R are known is
Options- A. I = VR
- B. I = R/V
- C. V = IR
- D. I = V/R
- Correct Answer
- I = V/R
- 1. The number 0.0003 multiplied by 10-3 is
Options- A. 0.0000003
- B. 0.0003
- C. 3
- D. 3,000 Discuss
- 2. A multimeter measures
Options- A. current
- B. voltage
- C. resistance
- D. current, voltage, and resistance Discuss
- 3. Eighteen thousand watts is the same as
Options- A. 18 mW
- B. 18 MW
- C. 18 kW
- D. 18 µW Discuss
- 4. A 12 kΩ resistor, a 15 kΩ resistor, and a 22 kΩ resistor are in series with two 10 kΩ resistors that are in parallel. The source voltage is 75 V. Current through the 15 kΩ resistor is approximately
Options- A. 14 mA
- B. 1.4 mA
- C. 5 mA
- D. 50 mA Discuss
- 5. Three 680 Ω resistors are connected in series with a 470 V source. Current in the circuit is
Options- A. 69 mA
- B. 230 mA
- C. 23 mA
- D. 690 mA Discuss
- 6. When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is
Options- A. overheated
- B. shorted
- C. open
- D. reversed Discuss
- 7. A 2 kΩ resistor is in series with a 0.015 µF capacitor across a 15 kHz ac source. What is the magnitude of the total impedance and the phase angle?
Options- A. 73.4 Ω and ? = ?19.5°
- B. 707 Ω and ? = ?19.5°
- C. 2121 Ω and ? = ?19.5°
- D. 734 Ω and ? = ?38.9° Discuss
- 8. 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
- 9. 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
- 10. 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
More questions
Correct Answer: 0.0000003
Correct Answer: current, voltage, and resistance
Correct Answer: 18 kW
Correct Answer: 1.4 mA
Correct Answer: 230 mA
Correct Answer: shorted
Correct Answer: 2121 Ω and ? = ?19.5°
Explanation:
Xc = 1/2?fC = 707 ?
Z = R - jXc = 2000 - j(707)
|z| = sqrt(R*R + Xc*Xc) = 2121 ?
Phase angle = arctangent(Xc/R) = 19.5°
Correct Answer: 5.5 mH
Correct Answer: 248 ?H
Correct Answer: 6.8 kΩ and 10 kΩ
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