Name:

 

  1. What is the unit of Capacitance?


  2. Are these capacitors in series or parallel?

    Series and Parallel

  3. Write down the formula for the total capacitance of the capacitors in the circuit above.





  4. In the circuit above if C1 = 20µF and C2 = 30µF, calculate the combined capacitance.





  5. Write down the formula for the total capacitance of the capacitors in the circuit below.

    Series and Parallel
  6. In the circuit above, are the capacitors in series or parallel?



  7. In the circuit above if C1 = 20µF and C2 = 30µF, calculate the combined capacitance.



  8. If the potential difference across a capacitor is doubled what happens to the charge stored in the capacitor?



  9. If the potential difference across a capacitor is doubled what happens to the energy stored in the capacitor?



  10. In what units is the charge in a capacitor measured?



  11. Capacitors _______________ direct current.

    Capacitors _______________ low frequencies but not ___________.

    Capacitors _______________ high frequencies ___________.


  12. When a capacitor is used to pass AC signals from one module to another, it is

    called a _________________ capacitor.


  13. When a capacitor is used to remove 50 Hz or 100 Hz ripple from the output of a

    power supply, it is called a _____________ capacitor.


  14. When a capacitor is used to remove alternating voltages from a point in a circuit

    it is called a _________________ capacitor.


  15. Write down the formula for the time constant of an RC network as shown below.

    RC Network

  16. In the circuit above, if R = 358 k and C = 31 µF, calculate the time constant of the circuit.




  17. In the circuit above, if the capacitor is initially uncharged, if R = 1M and C = 1 µF, how long will it take for the capacitor to become fully charged?




  18. In the circuit above, if C is initially uncharged and if R = 1M and C = 1 Microfarad, after one second, what percentage of the supply voltage will be across C?




  19. In the circuit above, if C is initially uncharged and if R = 1M and C = 1 Microfarad, how many milliseconds does it take for the capacitor to charge to half the supply voltage?




  20. Unwanted high frequency pulses are preventing a digital counter from

    functioning correctly. A capacitor can be used to _____________ the

    power supply to the counter circuit chips.


  21. Write down the formula for capacitative reactance.




    What is the reactance of a 220µF capacitor at 50 Hz?




  22. Calculate the resonant frequency of a tuned circuit where C = 1µF and L = 10µH

    Tuned Circuit




  23. The tuned circuit above has a resonant frequency of 5kHz. If L = 500µH, calculate C.