Question

What is reactance?

(a) Resistance offered to ac current by resistor only

(b) Resistance offered to dc current by resistor

(c) Resistance offered to ac current by coil and capacitance

(d) Resistance offered to dc current by coil and capacitance

I have been asked this question during an online interview.

This interesting question is from Tuned Circuits topic in portion Fundamentals of Electronics of Avionics

Answer 1

The correct answer is (c) Resistance offered to ac current by coil and capacitance

To elaborate: Both coils and capacitors offer an opposition to alternating current flow known as reactance, which is expressed in ohms. Like resistance, reactance is an opposition that directly affects the amount of current in a circuit.