NEET UG · Physics · Class 12

Alternating Current: NEET previous year questions

15 questions in ten years of NEET, asked in 8 of 10 years. Here is what this chapter tests and how.

Asked in 10 years: 15; 8 of 10 papers
10-year average: 1.4; a paper · 1.3 since 2024 -0.2
Typical range: 0–3; questions a paper; fewest 0, most 3
Weighted estimate: 1.6; model, recent papers count more · about 6 marks

Typical range (fact)
10-year average (fact)
Weighted estimate (model)

Typical range: questions per paper in the middle eight of the ten papers, leaving out the single highest and lowest year (about the 10th to 90th percentile), each paper scaled to 180 questions. The ten-year average and the range are historical fact. The weighted estimate is a model: each paper's share, with recent papers counting more (half-life three years), and dropped syllabus removed. It is a guide to effort, not a forecast.

What to do

How to spend time on Alternating Current

Priority

Lower priority

Among the chapters that shared the last fifth of the questions. How bands are set

Past questions: 15in 8 of 10 papers
Study plan gives it: 12 hover 12 months; 9 h over 6

Study this chapter →Practise →

Ideas asked most often

Ideal Transformer3×
Series LCR Impedance Calculation2×
Capacitive Reactance Calculation2×
Resonant Frequency Condition2×

79 of the 93 ideas in Lumi’s map of this chapter have not been asked or touched in ten years. New questions often come from ideas like these, so learn the whole chapter, not just the list above.

Questions per year

Kind of question

SHARE OF 10 YEARS

Calculation87%
Recall7%
Figure-based7%

Most common asks: numerical (14); relation of peak and rms value (1).

Profile

This chapter in numbers

Where it ranks, how steady it is, and what it costs to study.

Rank, all NEET chapters: #60; of 80 by weighted estimate
Rank in Physics: #16; of 27 chapters
Share of the paper: 0.8%; ten-year average
Busiest year: 2021; 3 questions
Year to year: Some swing; varies by about 0.9 questions
Long-run direction: +0.12; questions per paper, per year
Easy questions: 53%; 58% of ideas rated hard
With a figure: 20%; graph, diagram or structure
Study time: 12 h; 9 h on a 6-month plan
Marks per study hour: 0.49; #72 of 80 chapters
Foundation for others: 72%; of its ideas are used in other chapters

Difficulty, year by year

Each question rated easy, medium or hard against NCERT.

2017
20181
2019
20202
20213
20222
20233
20242
20251
20261

Easy
Medium
Hard

What it asks you to do

SHARE OF QUESTIONS

Calculation67%
Multi-step20%
Recall7%
Application7%

Coverage

How much of the chapter NEET has used

We split the chapter into 93 ideas. In ten years NEET built a question around 9 of them. Most of the chapter has never been asked, which is why learning it whole beats memorising past questions.

Asked as the main idea: 9
Touched on in a question: 5
Never asked: 79

Topics

What repeats, topic by topic

Questions per topic in each year's paper. Topics that come every year are worth learning first.

LCR Circuits · Every year15
12323211

’17’18’19’20’21’22’23’24’25’26

Topic	2017	’18	2019	’20	2021	’22	2023	’24	2025	’26	Total
LCR CircuitsEvery year	·	1	·	2	3	2	3	2	1	1	15

03+questions in that year’s paper

LCR Circuits
Expect a short numerical problem (one or two formula steps, four numeric options) about LCR Circuits. Past framings centre on: numerical; relation of peak and rms value.

Drill down

Topic, idea, question

Open a topic to see every idea NEET tested inside it, then open an idea to read the questions. Each row shows its ten papers.

topicAskedShareYears’17’18’19’20’21’22’23’24’25’26

Open15 · 100%100%8/1023232
10 ideas inside
- Repeated3 · 20%20%3/10
- Repeated2 · 13%13%2/10
- Repeated2 · 13%13%2/10
- Repeated2 · 13%13%2/10
- 1 · 7%7%1/10
- 1 · 7%7%1/10
- 1 · 7%7%1/10
- 1 · 7%7%1/10
- 1 · 7%7%1/10
- 1 · 7%7%1/10

Squares are the ten papers, 2017 to 2026; darker means more questions. Share is of the level above.

Ideas

The exact ideas NEET has asked

Inside the topics, 10 different ideas were tested. These came more than once, or are new since 2024.

Ideal Transformer3×
numerical
Series LCR Impedance Calculation2×
numerical
Capacitive Reactance Calculation2×
numerical
Resonant Frequency Condition2×
numerical
LCR Phase Angle CalculationNew1×
numerical

Idea	Times	Usually asked as
Ideal Transformernumerical	3	Numerical
Series LCR Impedance Calculationnumerical	2	Figure-based
Capacitive Reactance Calculationnumerical	2	Numerical
Resonant Frequency Conditionnumerical	2	Numerical
LCR Phase Angle Calculationnumerical	1	NumericalNew

Every question

Alternating Current questions, year by year

The opening words of each question as it appeared in the official paper.

NEET 20261 question

Q30An ac voltage $V=220\sin(2\times10^3t)$ Volt is applied to a series LCR circuit. Then the current amplitude in this circuit is : (Given :…Numerical

NEET 20251 question

Q16To an ac power supply of 220 V at 50 Hz, a resistor of 20 Ω, a capacitor of reactance 25 Ω and an inductor of reactance 45 Ω are connected…Numerical

NEET 20242 questions

Q22In an ideal transformer, the turns ratio is $\frac{N_p}{N_s} = \frac{1}{2}$ . The ratio $V_s : V_p$ is equal to (the symbols carry their…Numerical
Q50A 10 $\mu$ F capacitor is connected to a 210 V, 50 Hz source as shown in figure. The peak current in the circuit is nearly ( $\pi = 3.14$ ):Numerical · figure

NEET 20233 questions

Q4A 12 V, 60 W lamp is connected to the secondary of a step down transformer, whose primary is connected to ac mains of 220 V. Assuming the…Numerical
Q20In a series $LCR$ circuit, the inductance $L$ is 10 mH, capacitance $C$ is 1 $\mu$ F and resistance $R$ is 100 $\Omega$ . The frequency at…Numerical
Q38The net impedance of circuit (as shown in figure) will be :Figure-based · figure

NEET 20222 questions

Q19The peak voltage of the ac source is equal to :One-line MCQ
Q37A series LCR circuit with inductance 10 H, capacitance 10 μF, resistance 50 Ω is connected to an ac source of voltage, V = 200 sin(100 t)…Numerical

NEET 20213 questions

Q34An inductor of inductance L, a capacitor of capacitance C and a resistor of resistance 'R' are connected in series to an ac source of…Numerical · figure
Q37A series LCR circuit containing 5.0 H inductor, 80 $\mu$ F capacitor and 40 Ω resistor is connected to 230 V variable frequency ac source.…Numerical
Q39A step down transformer connected to an ac mains supply of 220 V is made to operate at 11 V, 44 W lamp. Ignoring power losses in the…Numerical

NEET 20202 questions

Q154A 40 $\mu$ F capacitor is connected to a 200 V, 50 Hz ac supply. The rms value of the current in the circuit is, nearly :Numerical
Q169A series LCR circuit is connected to an ac voltage source. When L is removed from the circuit, the phase difference between current and…Numerical

NEET 20181 question

Q28An inductor 20 mH, a capacitor 100 $\mu$ F and a resistor 50 $\Omega$ are connected in series across a source of emf, V = 10 sin 314 t. The…Numerical

Questions from the official NEET UG papers published by NTA (CBSE before 2019). Topic and idea tags, counts and notes are Lumi’s.

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