_____________ is the total opposition to current flow caused by the transformer

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Multiple Choice

_____________ is the total opposition to current flow caused by the transformer

Explanation:
Total opposition to current flow in an AC device like a transformer is impedance. Impedance combines resistance, which dissipates power as heat, and reactance, which stores and releases energy in the magnetic and electric fields. This gives the overall opposition as Z = R + jX, capturing both the amount of opposition and the phase relationship between voltage and current. Admittance is the reciprocal of impedance and tells how easily current flows, not the total opposition. Reactance alone doesn’t account for the resistive losses, and resistance alone ignores the reactive effects, so impedance is the correct term.

Total opposition to current flow in an AC device like a transformer is impedance. Impedance combines resistance, which dissipates power as heat, and reactance, which stores and releases energy in the magnetic and electric fields. This gives the overall opposition as Z = R + jX, capturing both the amount of opposition and the phase relationship between voltage and current. Admittance is the reciprocal of impedance and tells how easily current flows, not the total opposition. Reactance alone doesn’t account for the resistive losses, and resistance alone ignores the reactive effects, so impedance is the correct term.

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