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AC Through R, L and C for GUJCET: 26 solved questions

Real GUJCET paper questions on ac through r, l and c, part of alternating current. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2011 to 2026. No sign-in needed to read them.

What this topic asks

• Reactance and frequency — 15 questions
• Behaviour of R, L and C separately — 7 questions
• Phase relationships and phasors — 4 questions

All 26 questions with solutions

• What should be the value of the self-inductance of an inductor that should be connected to a 220 V, 50 Hz sup… GUJCET 2011
• The capacity of a pure capacitor is 1 farad in a d.c. circuit. Then what will be its capacitive reactance? GUJCET 2013
• In an A.C. circuit having only a capacitor, the current . GUJCET 2015
• An alternating voltage V=100√2 sin(100t) V is applied to a capacitor of 1 μF. The current reading of the amme… GUJCET 2015
• If the angular frequency of the A.C. source used in an L-C-R circuit is decreased, then the inductive reactan… GUJCET 2016
• A capacitor C is connected across a D.C. source. The reactance of the capacitor will be . GUJCET 2018
• If in an A.C. L-C series circuit X_C>X_L, then the potential _. GUJCET 2019
• A 50 μF capacitor is connected to a 110 V, 60 Hz ac supply. Determine the rms value of the current in the cir… GUJCET 2021
• A pure inductor of 50.0 mH is connected to a source of 220 V. Then rms current in the circuit will be _. The… GUJCET 2024
• A 15.0 μF capacitor is connected to a 220 V, 50 Hz source. Then capacitive reactance of the circuit is Ω. GUJCET 2026
• In an L–R A.C. circuit, at time t the current is I and the time rate of change of current is (dI)/(dt). What… GSEB Board July 2015
• The resultant inductance of two inductors L₁ and L₂ when they are connected in parallel in an A.C. circuit is… GSEB Board March 2016
• A phasor is a vector. GSEB Board March 2016
• In an A.C. L-C series circuit X_L > X_C. Hence the current . GSEB Board July 2016
• An alternating voltage given as V = 200√2 sin(100t) V is applied to a capacitor of 5 μF. The current reading… GSEB Board July 2018
• A 15 μF capacitor is connected to a 220 V, 50 Hz a.c. source. The value of the capacitive reactance is . GSEB Board March 2020
• If in an A.C. L-C series circuit X_L<X_C, then the current in phase. GSEB Board March 2020 (old course)
• The units of 1/(ω L) and ω C are and . GSEB Board March 2020 (old course)
• An inductive reactance of an inductor is . GSEB Board March 2022
• A pure inductor of 25 mH is connected to a source of 220 V. If the frequency of the source is 50 Hz, the indu… GSEB Board July 2022
• In an AC circuit having only a capacitor, the electric current the voltage V in phase by . GSEB Board July 2022
• Inductive reactance . GSEB Board March 2023
• A 44 mH inductor is connected to a 220 V, 50 Hz ac supply. The rms value of the current in the circuit is . GSEB Board July 2023
• On decreasing the angular frequency of the A.C. source used in an L-C-R series circuit, the capacitive reacta… RS Academy GUJCET booklet
• An inductor of inductance L henry is connected to an A.C. source V = V₀ sin ω t. Then the current flowing thr… RS Academy GUJCET booklet
• An alternating voltage given as V = 200√2 sin(100t) V is applied to a capacitor of 1 μF. The current reading… RS Academy GUJCET booklet