Previous Year Question
Which of the following represents the imaginary part of an impedance?
Correct answer: D
Explanation
Impedance is written Z=R+jX. Its real part R is resistance and its imaginary part X is reactance. Conductance and susceptance belong to admittance Y=G+jB.
Formula
Z=R+jX
Step-by-step solution
Correct Answer
D — Reactance
Concept and Reasoning
Impedance is written Z=R+jX. Its real part R is resistance and its imaginary part X is reactance. Conductance and susceptance belong to admittance Y=G+jB.
Calculation / Key Relation
Z=R+jX
Exam Takeaway
Impedance → R and X; admittance → G and B.
Common Mistake
Do not confuse reactance X with susceptance B.
Common mistake
Do not confuse reactance X with susceptance B.
Exam tip
Impedance → R and X; admittance → G and B.
Quick method
Impedance → R and X; admittance → G and B.