When the efficiency of an RLC circuit is 50%, then the circuit will be in.
Correct answer: A. Resonance
- A. Resonance
- B. Not in resonance
- C. Not possible
- D. None of the above
Explanation
This question relates to the maximum power transfer theorem. If the RLC circuit itself is considered the "load" for a source, maximum power is transferred (and efficiency is 50%) when the load impedance matches the source impedance. This condition is often met at resonance.
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About Alternating Current
Alternating current varies periodically, so phase relationships become essential when current passes through a resistor, capacitor or inductor. The chapter distinguishes resistance from capacitive and inductive reactance, explains phase lead and lag, and connects changing electric and magnetic fields with the production and properties of electromagnetic waves.
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