A 240 V single-phase source feeds a purely resistive load drawing 30 A. Assume negligible reactance and 0.25 ohm total outgoing-plus-return conductor resistance. What is the load-terminal voltage?

Electrician exam practice question · Electrical Theory & Fundamentals

A 240 V single-phase source feeds a purely resistive load drawing 30 A. Assume negligible reactance and 0.25 ohm total outgoing-plus-return conductor resistance. What is the load-terminal voltage?

232.5 V
B240 V
C247.5 V
D225 V

Where to look it up

Explicit exercise assumptions; not a universal code requirement.

Why A is correct

For these unity-power-factor, resistive assumptions, conductor drop = 30 × 0.25 = 7.5 V, and load voltage = 240 − 7.5 = 232.5 V. The stated loop resistance already includes both conductors.

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A 240 V single-phase source feeds a purely resistive load drawing 30 A. Assume negligible reactance and 0.25 ohm total outgoing-plus-return conductor resistance. What is the load-terminal voltage?

A 240 V single-phase source feeds a purely resistive load drawing 30 A. Assume negligible reactance and 0.25 ohm total outgoing-plus-return conductor resistance. What is the load-terminal voltage?

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