Question

7.Which of the following is independent of frequency


• Reactance of Inductor

• Resistance

• Reactance of capacitor

• Impendence
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Answer 1

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• Impedance

Answer 2

The correct answer is option (d) Impendence.

Explanation:

• Impendence is independent of frequency
• The impedance is independent of frequency.
• Therefore, the phase shift is zero.
• The impedance of an ideal resistor is flat with its frequency.
• The resistance is depend on frequency this is due to 'skin effect' i.e When an alternating current is passed through a conductor only a small portion of the conductor, generally called the skin depth carries the current.
• The main circuit elements that consists reactance (capacitors and inductors) have a frequency dependent reactance, unlike resistors which typically have the same resistance for every frequencies.