Discussion
Home ‣ Electrical Engineering ‣ Capacitors Comments
- Question
Two series capacitors (one 2 µF, the other of unknown value) are charged from a 24 V source. The 2 µF capacitor is charged to 16 V and the other to 8 V. The value of the unknown capacitor is
Options- A. 1 µF
- B. 2 µF
- C. 4 µF
- D. 8 µF
- Correct Answer
- 4 µF
- 1. When the plate area of a capacitor increases,
Options- A. the capacitance increases
- B. the capacitance decreases
- C. the capacitance is unaffected
- D. the voltage it can withstand increases. Discuss
- 2. A 2 µF, a 4 µF, and a 10 µF capacitor are connected in series. The total capacitance is less than
Options- A. 2 µF
- B. 4 µF
- C. 10 µF
- D. 1.5 µF Discuss
- 3. If the steel disk in a crankshaft position sensor has stopped with the tab in the magnet's air gap, the induced voltage
Options- A. increases
- B. decreases
- C. is zero
- D. will remain constant Discuss
- 4. What is the flux density when the flux is 5.5 µWb and the cross-sectional area is 6 × 10?3 m2?
Options- A. 91.7 µT
- B. 917 µT
- C. 91 T
- D. 9.7 T Discuss
- 5. A basic one-loop dc generator is rotated at 90 rev/s. How many times each second does the dc output voltage peak (reach maximum)?
Options- A. 90
- B. 180
- C. 270
- D. 360 Discuss
- 6. An uncharged capacitor and a 1 kΩ resistor are connected in series with a switch and a 6 V battery. At the instant the switch is closed, the voltage across the capacitor is
Options- A. 6 V
- B. 3 V
- C. 2 V
- D. 0 V Discuss
- 7. Two 0.68 µF capacitors are connected in series across a 10 kHz sine wave signal source. The total capacitive reactance is
Options- A. 46.8 Ω
- B. 4.68 Ω
- C. 23.41 Ω
- D. 11.70 Ω Discuss
- 8. A sine wave voltage is applied across a capacitor. When the frequency of the voltage is decreased, the current
Options- A. increases
- B. remains constant
- C. decreases
- D. ceases Discuss
- 9. What is the capacitance when Q = 60 µC and V = 12 V?
Options- A. 720 µF
- B. 5 µF
- C. 50 µF
- D. 12 µF Discuss
- 10. A 0.01 µF capacitor equals how many picofarads?
Options- A. 100 pF
- B. 1,000 pF
- C. 10,000 pF
- D. 100,000 pF Discuss
Capacitors problems
Search Results
Correct Answer: the capacitance increases
Correct Answer: 1.5 µF
Correct Answer: is zero
Correct Answer: 917 µT
Correct Answer: 180
Correct Answer: 0 V
Correct Answer: 46.8 Ω
Correct Answer: decreases
Correct Answer: 5 µF
Correct Answer: 10,000 pF
Comments
Hello
Q=c'×v' =2×16 =32 ¶f Q=C2×v2 C2=32/8 C2=4 ¶f Therefore charge is unknown capacitor is 4 micro farad
Q=c'×v' =2×16 =32 ¶f Q=C2×v2 C2=32/8 C2=4 ¶f Therefore charge is unknown capacitor is 4 micro farad
?
Q=c'×v' =2×16 =32 ¶f Q=C2×v2 C2=32/8 C2=4 ¶f Therefore charge is unknown capacitor is 4 micro farad
Q=c'×v' =2×16 =32 ¶f Q=C2×v2 C2=32/8 C2=4 ¶f Therefore charge is unknown capacitor is 4 micro farad
More in Electrical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.
Q=c'×v' =2×16 =32 ¶f Q=C2×v2 C2=32/8 C2=4 ¶f Therefore charge is unknown capacitor is 4 micro farad