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Power in AC Circuits for GSEB: 6 solved questions

Real GSEB paper questions on power in ac circuits, part of alternating current. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2015 to 2023. No sign-in needed to read them.

What this topic asks

• Power factor — 5 questions
• Average power and heating — 1 question

All 6 questions with solutions

• The power in an AC circuit is given by P=VᵣₘₛIᵣₘₛ cos δ. The power factor at the resonant frequency of a seri… GSEB Board July 2015
• V and I in an A.C. circuit are given by the following equations: V=100 sin(100t) V, I=100 sin (100t+π/3) mA.… GSEB Board July 2016
• In an A.C. circuit the current is 2 A, the voltage is 220 V and the power is 44 W. The power factor is . GSEB Board March 2018
• The power factor for an L-R A.C. circuit is . GSEB Board July 2018
• The power factor at the time of resonance is . GSEB Board March 2022
• For circuits used for transporting electric power, a low power factor implies _. GSEB Board March 2023