Explore: All CBSE Class 12 chapters · CBSE Class 12 Physics PYQs · CBSE Class 12 hub · Syllabus & pattern · Class 12 2026
Answer first
Alternating Current PYQs (previous year questions) for CBSE Class 12: Alternating Current (Physics) had 11 questions across the 50 official CBSE Class 12 papers we tagged (2016–2026), and appeared in 9 of them. Asked in 9 of 10 years. The concepts asked in the most papers: LCR Circuit, Power in AC Circuits, AC Circuit Elements.
Year-wise question count
Asked in 9 of 10 years.
Most-asked concepts
Sorted by the number of papers a concept appeared in.
| Concept | Questions | Papers | Years |
|---|---|---|---|
| LCR Circuit | 4 | 4 | 2026, 2024, 2023, 2019 |
| AC Circuit Elements | 2 | 2 | 2024, 2017 |
| Power in AC Circuits | 2 | 2 | 2025, 2016 |
| Capacitive Reactance | 1 | 1 | 2024 |
| RC Circuit | 1 | 1 | 2020 |
| Transformer | 1 | 1 | 2018 |
How to practise Alternating Current PYQs
- Start with the concepts at the top of the table. They have come back the most.
- Solve one year’s Alternating Current questions from the official PDF against the clock, then check the answer listed below.
- Log every miss as a concept gap, a calculation slip or a misread. Each needs a different fix.
- Once a concept is clean in two papers, move to the next. Then sit a full paper from the year pages.
Questions by year
Each line gives the question number and paper, type, concept, our one-line summary, with a link to the official PDF.
CBSE Class 122026
- Q.6 (Physics (55/1/1)) · MCQ · LCR Circuit: Inductor voltage in LCR circuit after capacitor is shorted PDF
CBSE Class 122025
- Q.6 (Physics (55/1/1)) · MCQ · Power in AC Circuits: Average power over a cycle with a phase difference PDF
CBSE Class 122024
- Q.7 (Physics (55/1/1)) · MCQ · Capacitive Reactance: New reactance when capacitance doubles and frequency triples PDF
- Q.25 (Physics (55/1/1)) · Short answer · LCR Circuit: Average power in series LCR circuit and resonant frequency PDF
- Q.32 (Physics (55/1/1)) · Long answer · AC Circuit Elements: RC impedance; inductor in DC; inductance for a lamp on AC mains PDF
CBSE Class 122023
- Q.27 (Physics (55/1/1)) · Short answer · LCR Circuit: Resistance vs impedance; impedance of series LCR using phasors PDF
CBSE Class 122020
- Q.30 (Physics (55/1/1)) · Long answer · RC Circuit: Peak voltages across R and C in series and phase between V and I PDF
CBSE Class 122019
- Q.25 (Physics (55/1/1)) · Long answer · LCR Circuit: LCR impedance vs frequency; phase at resonance; inductance from AC/DC currents PDF
CBSE Class 122018
- Q.23 (Physics (55/1)) · Value based · Transformer: Transformer, power loss in long distance AC transmission and values PDF
CBSE Class 122017
- Q.25 (Physics (55/1)) · Long answer · AC Circuit Elements: Identify device from V, I, P curves; impedance vs frequency; phase relation PDF
CBSE Class 122016
- Q.14 (Physics (55/1/N)) · Short answer · Power in AC Circuits: Zero average power in a capacitor; bulb brightness as capacitance falls PDF
Other Physics chapters
- Electric Charges and Fields PYQs
- Electrostatic Potential and Capacitance PYQs
- Current Electricity PYQs
- Moving Charges and Magnetism PYQs
- Magnetism and Matter PYQs
- Electromagnetic Induction PYQs
- Electromagnetic Waves PYQs
- Ray Optics and Optical Instruments PYQs
- Wave Optics PYQs
- Dual Nature of Radiation and Matter PYQs
- Atoms PYQs
- Nuclei PYQs
- Semiconductor Electronics PYQs
- Communication Systems PYQs
FAQ
How many Alternating Current questions come in CBSE Class 12?
In the official papers we tagged: 1 in 2026, 1 in 2025, 3 in 2024, 1 in 2023, 1 in 2020, 1 in 2019, 1 in 2018, 1 in 2017 and 1 in 2016. Not asked in the other year. That is 11 questions in all, about 4% of Physics.
Which Alternating Current topics repeat in CBSE Class 12?
Asked in the most papers: LCR Circuit, Power in AC Circuits, AC Circuit Elements. The concept table lists every one with its count.
Are these official CBSE Class 12 questions?
Yes. Every question is from an official CBSE Class 12 paper hosted on our year pages. The one-line summaries are ours; open the PDF linked beside each question for the full text.