G5C01:

What causes a voltage to appear across the secondary winding of a transformer when an AC voltage source is connected across its primary winding?

  1. Capacitive coupling
  2. Displacement current coupling
  3. Mutual inductance
  4. Mutual capacitance

G5C02:

What happens if a signal is applied to the secondary winding of a 4:1 voltage step-down transformer instead of the primary winding?

  1. The output voltage is multiplied by 4
  2. The output voltage is divided by 4
  3. Additional resistance must be added in series with the primary to prevent overload
  4. Additional resistance must be added in parallel with the secondary to prevent overload

G5C03:

Which of the following components increases the total resistance of a resistor?

  1. A parallel resistor
  2. A series resistor
  3. A series capacitor
  4. A parallel capacitor

G5C04:

What is the total resistance of three 100 ohm resistors in parallel?

  1. 0.30 ohms
  2. 0.33 ohms
  3. 33.3 ohms
  4. 300 ohms

G5C05:

If three equal value resistors in series produce 450 ohms, what is the value of each resistor?

  1. 1500 ohms
  2. 90 ohms
  3. 150 ohms
  4. 175 ohms

G5C06:

What is the RMS voltage across a 500-turn secondary winding in a transformer if the 2250-turn primary is connected to 120 VAC?

  1. 2370 volts
  2. 540 volts
  3. 26.7 volts
  4. 5.9 volts

G5C07:

What is the turns ratio of a transformer used to match an audio amplifier having 600 ohm output impedance to a speaker having 4 ohm impedance?

  1. 12.2 to 1
  2. 24.4 to 1
  3. 150 to 1
  4. 300 to 1

G5C08:

What is the equivalent capacitance of two 5.0 nanofarad capacitors and one 750 picofarad capacitor connected in parallel?

  1. 576.9 nanofarads
  2. 1733 picofarads
  3. 3583 picofarads
  4. 10.750 nanofarads

G5C09:

What is the capacitance of three 100 microfarad capacitors connected in series?

  1. 0.30 microfarads
  2. 0.33 microfarads
  3. 33.3 microfarads
  4. 300 microfarads

G5C10:

What is the inductance of three 10 millihenry inductors connected in parallel?

  1. 0.30 henries
  2. 3.3 henries
  3. 3.3 millihenries
  4. 30 millihenries

G5C11:

What is the inductance of a 20 millihenry inductor connected in series with a 50 millihenry inductor?

  1. 0.07 millihenries
  2. 14.3 millihenries
  3. 70 millihenries
  4. 1000 millihenries

G5C12:

What is the capacitance of a 20 microfarad capacitor connected in series with a 50 microfarad capacitor?

  1. 0.07 microfarads
  2. 14.3 microfarads
  3. 70 microfarads
  4. 1000 microfarads

G5C13:

Which of the following components should be added to a capacitor to increase the capacitance?

  1. An inductor in series
  2. A resistor in series
  3. A capacitor in parallel
  4. A capacitor in series

G5C14:

Which of the following components should be added to an inductor to increase the inductance?

  1. A capacitor in series
  2. A resistor in parallel
  3. An inductor in parallel
  4. An inductor in series

G5C15:

What is the total resistance of a 10 ohm, a 20 ohm, and a 50 ohm resistor connected in parallel?

  1. 5.9 ohms
  2. 0.17 ohms
  3. 10000 ohms
  4. 80 ohms

G5C16:

Why is the conductor of the primary winding of many voltage step-up transformers larger in diameter than the conductor of the secondary winding?

  1. To improve the coupling between the primary and secondary
  2. To accommodate the higher current of the primary
  3. To prevent parasitic oscillations due to resistive losses in the primary
  4. To ensure that the volume of the primary winding is equal to the volume of the secondary winding

G5C17:

What is the value in nanofarads (nF) of a 22,000 picofarad (pF) capacitor?

  1. 0.22
  2. 2.2
  3. 22
  4. 220

G5C18:

What is the value in microfarads of a 4700 nanofarad (nF) capacitor?

  1. 47
  2. 0.47
  3. 47,000
  4. 4.7