What is the function of a power supply bleeder resistor?

1. A It acts as a fuse for excess voltage
2. B It discharges the filter capacitors when power is removed
3. C It removes shock hazards from the induction coils
4. D It eliminates ground loop current

Which of the following components are used in a power supply filter network?

1. A Diodes
2. B Transformers and transducers
3. C Capacitors and inductors
4. D All these choices are correct

Which type of rectifier circuit uses two diodes and a center-tapped transformer?

1. A Full-wave
2. B Full-wave bridge
3. C Half-wave
4. D Synchronous

What is characteristic of a half-wave rectifier in a power supply?

1. A Only one diode is required
2. B The ripple frequency is twice that of a full-wave rectifier
3. C More current can be drawn from the half-wave rectifier
4. D The output voltage is two times the peak input voltage

What portion of the AC cycle is converted to DC by a half-wave rectifier?

1. A 90 degrees
2. B 180 degrees
3. C 270 degrees
4. D 360 degrees

What portion of the AC cycle is converted to DC by a full-wave rectifier?

1. A 90 degrees
2. B 180 degrees
3. C 270 degrees
4. D 360 degrees

What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

1. A A series of DC pulses at twice the frequency of the AC input
2. B A series of DC pulses at the same frequency as the AC input
3. C A sine wave at half the frequency of the AC input
4. D A steady DC voltage

Which of the following is characteristic of a switchmode power supply as compared to a linear power supply?

1. A Faster switching time makes higher output voltage possible
2. B Fewer circuit components are required
3. C High-frequency operation allows the use of smaller components
4. D Inherently more stable

Which symbol in figure G7-1 represents a field effect transistor?

1. A Symbol 2
2. B Symbol 5
3. C Symbol 1
4. D Symbol 4

Which symbol in figure G7-1 represents a Zener diode?

1. A Symbol 4
2. B Symbol 1
3. C Symbol 11
4. D Symbol 5

Which symbol in figure G7-1 represents an NPN junction transistor?

1. A Symbol 1
2. B Symbol 2
3. C Symbol 7
4. D Symbol 11

Which symbol in Figure G7-1 represents a solid core transformer?

1. A Symbol 4
2. B Symbol 7
3. C Symbol 6
4. D Symbol 1

Which symbol in Figure G7-1 represents a tapped inductor?

1. A Symbol 7
2. B Symbol 11
3. C Symbol 6
4. D Symbol 1