The analogue of a choke coil in a DC circuit is.
Correct answer: A. Rheostat
- A. Rheostat
- B. Potential divider
- C. Thermistor
- D. Resistor
Explanation
A choke coil is used to limit or control current in an AC circuit with minimal power loss. A rheostat is a variable resistor used to control current in a DC circuit. Both serve function of current control, making the rheostat the DC analogue.
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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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