Practice portal › GUJCET › Alternating Current

Power in AC Circuits for GUJCET: 16 solved questions

Real GUJCET 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 2009 to 2024. No sign-in needed to read them.

What this topic asks

• Power factor — 11 questions
• Average power and heating — 4 questions
• Wattless current — 1 question

All 16 questions with solutions

• What is the average power dissipation in an ideal capacitor in an A.C. circuit? GUJCET 2009
• In an R-C a.c. circuit the maximum voltage and maximum current are 100 V and 1.1 A respectively. If X_C=60 Ω… GUJCET 2013
• A lamp consumed only 50 % of the maximum power applied in an A.C. circuit. What will be the phase difference… GUJCET 2014
• In an AC circuit, the current is 3 A, the voltage is 210 V and the power is 63 W. The power factor is GUJCET 2017
• A lamp consumes only 50% of maximum power in an A.C. circuit. What is the phase difference between the applie… GUJCET 2018
• A sinusoidal A.C. current flows through a resistor of resistance 10 Ω. If the peak current through the resist… GUJCET 2018
• In LCR series a.c. circuit at resonance the value of power factor will be _. GUJCET 2024
• For obtaining wattless current is connected with a.c. supply. GUJCET 2024
• 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
• The power in an A.C. circuit is given as P=VᵣₘₛIᵣₘₛ cos δ. The power factor at the resonance frequency of a s… RS Academy GUJCET booklet
• In an A.C. circuit the current is 2 A, the voltage is 220 V and the power is 40 W. The power factor is ......… RS Academy GUJCET booklet