What is the impedance of a resistor in phasor form?

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Multiple Choice

What is the impedance of a resistor in phasor form?

Explanation:
In phasor analysis, impedance Z links voltage and current as V = ZI. For a resistor, voltage and current are in phase, so there’s no reactive part. That makes Z purely real and equal to R. Its magnitude is R and its angle is 0 degrees, and this impedance does not depend on frequency. The other forms are for reactive elements: jωL is the inductor’s impedance (purely imaginary positive), and 1/(jωC) equals -j/(ωC) is the capacitor’s impedance (purely imaginary negative).

In phasor analysis, impedance Z links voltage and current as V = ZI. For a resistor, voltage and current are in phase, so there’s no reactive part. That makes Z purely real and equal to R. Its magnitude is R and its angle is 0 degrees, and this impedance does not depend on frequency.

The other forms are for reactive elements: jωL is the inductor’s impedance (purely imaginary positive), and 1/(jωC) equals -j/(ωC) is the capacitor’s impedance (purely imaginary negative).

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