What is the basic "control action" of a...

Question 1 of 270705eccefa5bacbc34ba4d486f3

What is the basic "control action" of a magnetic amplifier dependent upon?

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Question 1 of 27070

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What is the basic "control action" of a magnetic amplifier dependent upon?

🔍 Key Concepts

• How a magnetic amplifier controls current or voltage without using moving parts • The relationship between magnetic flux and coil properties (L, C, R) • What quantity in a coil is changed when the core’s magnetization is varied

💭 Think About

• Ask yourself: in a coil wound on an iron core, when you change the magnetization of the core, which property of the coil (capacitance, inductance, resistance, or conductance) is most directly affected? • Consider which of the four choices is normally associated with magnetic fields and coils, rather than with electric fields between plates or simple ohmic materials. • Think about how magnetic amplifiers can control a large AC current using a small DC control current—what property of the core or coil must change to make that possible?

✅ Before You Answer

• Identify which option is directly tied to coils and magnetic cores in basic AC circuit theory. • Eliminate the option that relates mainly to electric fields between plates rather than magnetic cores. • Confirm which property varies when the core’s permeability (its ability to carry magnetic flux) changes.