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Amateur Extra Class: 2020–2024
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E1: Commission's Rules
E2: Operating Procedures
E3: Radio Wave Propagation
E4: Amateur Practices
E5: Electrical Principles
E6: Circuit Components
E7: Practical Circuits
E8: Signals and Emissions
E9: Antennas and Transmission Lines
E0: Safety
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Element 4
E7
E7D
E7D02
E7D02:
What is a characteristic of a switching electronic voltage regulator?
The resistance of a control element is varied in direct proportion to the line voltage or load current
It is generally less efficient than a linear regulator
The controlled device's duty cycle is changed to produce a constant average output voltage
It gives a ramp voltage at its output
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