Which of the following types of linear voltage regulator operates by loading the unregulated voltage source?
The correct answer is D: A shunt regulator. Which of the following types of linear voltage regulator operates by loading the unregulated voltage source is a shunt regulator. Shunt regulators load the source by shunting current. For amateur radio operators, this is important for power supply design. Understanding this helps when selecting regulators.
Exam Tip
Linear regulator that loads unregulated source = shunt regulator. Think 'S'hunt 'R'egulator = 'S'hunts current (loads source). Shunt regulators load the source by shunting current. Not constant current source, not series regulator, not shunt current source - just shunt regulator.
Memory Aid
"Linear regulator that loads unregulated source = shunt regulator. Think 'S'hunt 'R'egulator = 'L'oads source. Shunt regulators load the source by shunting current. Important for power supply design."
Real-World Application
A linear voltage regulator that operates by loading the unregulated voltage source: It's a shunt regulator. The shunt regulator shunts excess current to ground, loading the source. This is the type - shunt regulator.
Key Concepts
Why Other Options Are Wrong
Option A (Constant current source): Incorrect. Constant current source isn't a voltage regulator - shunt regulator loads the source. Current source isn't the regulator.
Option B (Series regulator): Incorrect. Series regulator doesn't load the source - shunt regulator loads the source by shunting current. Series regulator isn't the answer.
Option C (Shunt current source): Incorrect. Shunt current source isn't a voltage regulator - shunt regulator loads the source. Current source isn't the regulator.
题目解析
The correct answer is D: A shunt regulator. Which of the following types of linear voltage regulator operates by loading the unregulated voltage source is a shunt regulator. Shunt regulators load the source by shunting current. For amateur radio operators, this is important for power supply design. Understanding this helps when selecting regulators.
考试技巧
Linear regulator that loads unregulated source = shunt regulator. Think 'S'hunt 'R'egulator = 'S'hunts current (loads source). Shunt regulators load the source by shunting current. Not constant current source, not series regulator, not shunt current source - just shunt regulator.
记忆口诀
Linear regulator that loads unregulated source = shunt regulator. Think 'S'hunt 'R'egulator = 'L'oads source. Shunt regulators load the source by shunting current. Important for power supply design.
实际应用示例
A linear voltage regulator that operates by loading the unregulated voltage source: It's a shunt regulator. The shunt regulator shunts excess current to ground, loading the source. This is the type - shunt regulator.
错误选项分析
Option A (Constant current source): Incorrect. Constant current source isn't a voltage regulator - shunt regulator loads the source. Current source isn't the regulator. Option B (Series regulator): Incorrect. Series regulator doesn't load the source - shunt regulator loads the source by shunting current. Series regulator isn't the answer. Option C (Shunt current source): Incorrect. Shunt current source isn't a voltage regulator - shunt regulator loads the source. Current source isn't the regulator.
知识点
Types of linear voltage regulator, Operates by loading unregulated voltage source, Shunt regulator
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.