3.4 KiB
3.4 KiB
G5C – Resistors, capacitors, and inductors in series and parallel; transformers
- G5C01 (C)
What causes a voltage to appear across the secondary winding of a transformer when an AC voltage source is connected across its primary winding? #card
- A. Capacitive coupling
- B. Displacement current coupling
- C. Mutual inductance
- D. Mutual capacitance
- G5C02 (A)
What is the output voltage if an input signal is applied to the secondary winding of a 4:1 voltage step-down transformer instead of the primary winding? #card
- A. The input voltage is multiplied by 4
- B. The input voltage is divided by 4
- C. Additional resistance must be added in series with the primary to prevent overload
- D. Additional resistance must be added in parallel with the secondary to prevent overload
- G5C03 (A)
What is the total resistance of a 10-, a 20-, and a 50-ohm resistor connected in parallel? #card
- A. 5.9 ohms
- B. 0.17 ohms
- C. 17 ohms
- D. 80 ohms
- G5C04 (D)
What is the approximate total resistance of a 100- and a 200-ohm resistor in parallel? #card
- A. 300 ohms
- B. 150 ohms
- C. 75 ohms
- D. 67 ohms
- G5C05 (B)
Why is the primary winding wire of a voltage step-up transformer usually a larger size than that of the secondary winding? #card
- A. To improve the coupling between the primary and secondary
- B. To accommodate the higher current of the primary
- C. To prevent parasitic oscillations due to resistive losses in the primary
- D. To ensure that the volume of the primary winding is equal to the volume of the secondary winding
- G5C06 (A)
What is the voltage output of a transformer with a 500-turn primary and a 1500-turn secondary when 120 VAC is applied to the primary? #card
- A. 360 volts
- B. 120 volts
- C. 40 volts
- D. 25.5 volts
- G5C07 (A)
What transformer turns ratio matches an antenna’s 600-ohm feed point impedance to a 50-ohm coaxial cable? #card
- A. 3.5 to 1
- B. 12 to 1
- C. 24 to 1
- D. 144 to 1
- G5C08 (D)
What is the equivalent capacitance of two 5.0-nanofarad capacitors and one 750-picofarad capacitor connected in parallel? #card
- A. 576.9 nanofarads
- B. 1,733 picofarads
- C. 3,583 picofarads
- D. 10.750 nanofarads
- G5C09 (C)
What is the capacitance of three 100-microfarad capacitors connected in series? #card
- A. 0.33 microfarads
- B. 3.0 microfarads
- C. 33.3 microfarads
- D. 300 microfarads
- G5C10 (C)
What is the inductance of three 10-millihenry inductors connected in parallel? #card
- A. 0.30 henries
- B. 3.3 henries
- C. 3.3 millihenries
- D. 30 millihenries
- G5C11 (C)
What is the inductance of a circuit with a 20-millihenry inductor connected in series with a 50-millihenry inductor? #card
- A. 7 millihenries
- B. 14.3 millihenries
- C. 70 millihenries
- D. 1,000 millihenries
- G5C12 (B)
What is the capacitance of a 20-microfarad capacitor connected in series with a 50-microfarad capacitor? #card
- A. 0.07 microfarads
- B. 14.3 microfarads
- C. 70 microfarads
- D. 1,000 microfarads
- G5C13 (C)
Which of the following components should be added to a capacitor to increase the capacitance? #card
- A. An inductor in series
- B. An inductor in parallel
- C. A capacitor in parallel
- D. A capacitor in series
- G5C14 (D)
Which of the following components should be added to an inductor to increase the inductance? #card
- A. A capacitor in series
- B. A capacitor in parallel
- C. An inductor in parallel
- D. An inductor in series