G7A – Power supplies; schematic symbols

- [[G7A01]] (B)
  What is the function of a power supply bleeder resistor? #card
	- A. It acts as a fuse for excess voltage
	- B. It discharges the filter capacitors when power is removed
	- C. It removes shock hazards from the induction coils
	- D. It eliminates ground loop current
- [[G7A02]] (C)
  Which of the following components are used in a power supply filter network? #card
	- A. Diodes
	- B. Transformers and transducers
	- C. Capacitors and inductors
	- D. All these choices are correct
- [[G7A03]] (A)
  Which type of rectifier circuit uses two diodes and a center-tapped transformer? #card
	- A. Full-wave
	- B. Full-wave bridge
	- C. Half-wave
	- D. Synchronous
- [[G7A04]] (A)
  What is characteristic of a half-wave rectifier in a power supply? #card
	- A. Only one diode is required
	- B. The ripple frequency is twice that of a full-wave rectifier
	- C. More current can be drawn from the half-wave rectifier
	- D. The output voltage is two times the peak input voltage
- [[G7A05]] (B)
  What portion of the AC cycle is converted to DC by a half-wave rectifier? #card
	- A. 90 degrees
	- B. 180 degrees
	- C. 270 degrees
	- D. 360 degrees
- [[G7A06]] (D)
  What portion of the AC cycle is converted to DC by a full-wave rectifier? #card
	- A. 90 degrees
	- B. 180 degrees
	- C. 270 degrees
	- D. 360 degrees
- [[G7A07]] (A)
  What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load? #card
	- A. A series of DC pulses at twice the frequency of the AC input
	- B. A series of DC pulses at the same frequency as the AC input
	- C. A sine wave at half the frequency of the AC input
	- D. A steady DC voltage
- [[G7A08]] (C)
  Which of the following is characteristic of a switchmode power supply as compared to a linear power supply? #card
	- A. Faster switching time makes higher output voltage possible
	- B. Fewer circuit components are required
	- C. High-frequency operation allows the use of smaller components
	- D. Inherently more stable
- [[G7A09]] (C)
  Which symbol in figure G7-1 represents a field effect transistor? #card
  ![image.png](../assets/image_1746125643370_0.png)
	- A. Symbol 2
	- B. Symbol 5
	- C. Symbol 1
	- D. Symbol 4
- [[G7A10]] (D)
  Which symbol in figure G7-1 represents a Zener diode? #card
  ![image.png](../assets/image_1746125643370_0.png)
	- A. Symbol 4
	- B. Symbol 1
	- C. Symbol 11
	- D. Symbol 5
- [[G7A11]] (B)
  Which symbol in figure G7-1 represents an NPN junction transistor? #card
  ![image.png](../assets/image_1746125643370_0.png)
	- A. Symbol 1
	- B. Symbol 2
	- C. Symbol 7
	- D. Symbol 11
- [[G7A12]] (C)
  Which symbol in Figure G7-1 represents a solid core transformer? #card
  ![image.png](../assets/image_1746125643370_0.png)
	- A. Symbol 4
	- B. Symbol 7
	- C. Symbol 6
	- D. Symbol 1
- [[G7A13]] (A)
  Which symbol in Figure G7-1 represents a tapped inductor? #card
  ![image.png](../assets/image_1746125643370_0.png)
	- A. Symbol 7
	- B. Symbol 11
	- C. Symbol 6
	- D. Symbol 1