A choke coil has.
Correct answer: C. High inductance and low resistance
- A. High inductance and high resistance
- B. Low inductance and low resistance
- C. High inductance and low resistance
- D. Low inductance and high resistance.
Explanation
A choke coil is designed to impede AC current effectively while minimizing energy loss. This is achieved by having a high inductance (to create high reactance) and a very low DC resistance (to minimize I²R heat loss).
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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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