City Guilds Model Questions Vol1 2019 Engineering Question 32

Practice objective / multiple choice question 32 from the 2019 City Guilds Model Questions Vol1 Engineering examination.

City Guilds Model Questions Vol1 2019 Engineering Objective / Multiple Choice Medium Difficulty
Question 32 CITY_GUILDS_MODEL_QUESTIONS_VOL1 • 2019 • ENGINEERING • objective

A single‑phase AC source supplies \(V_{rms}=240\) V at \(f=50\) Hz to a series circuit consisting of a resistor \(R\) and an inductor of unknown inductance \(L\). The measured rms current is \(I_{rms}=8\) A and the real power consumed is \(P=1440\) W. Determine the resistance \(R\) (in Ω) and the inductance \(L\) (in H).

Answer Options

A. R = 20 Ω, L ≈ 0.025 H (25 mH)
B. R = 30 Ω, L ≈ 0.040 H (40 mH)
Correct Answer C. R = 22.5 Ω, L ≈ 0.0313 H (31.3 mH)
D. R = 22.5 Ω, L ≈ 0.050 H (50 mH)
Correct Answer
C
Correct Option:
R = 22.5 Ω, L ≈ 0.0313 H (31.3 mH)

About This Question

This is City Guilds Model Questions Vol1 2019 Engineering Question 32. It is one of the objective questions from the 2019 City Guilds Model Questions Vol1 Engineering examination.

Difficulty level: Medium .

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