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AC Through R, L and C for GSEB: 13 solved questions

Real GSEB 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 2015 to 2023. No sign-in needed to read them.

What this topic asks

• Reactance and frequency — 7 questions
• Behaviour of R, L and C separately — 3 questions
• Phase relationships and phasors — 3 questions

All 13 questions with solutions

• 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