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Physics - Alternating Current

Practise 89 AP EAMCET previous year questions on Alternating Current, compiled from papers spanning 2005 to 2025. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty AP EAMCET tests.

Alternating Current has been asked in 17 of the 24 years of AP EAMCET papers analysed (2001–2024), with 89 questions in all. 52% of them were easy, 43% moderate and 6% tough. Most of its questions came from 2022, with 12 questions that year. In the last three years (2022–2024) it had 31 questions across 28 papers, about 1.1 per paper.

The chapter's 6 topics are not weighted equally: AC Circuits (41 questions, 46%), Alternating Current, Voltage and Power (31 questions, 35%), and Transformers (8 questions, 9%) have been asked the most. AC Circuits has also led over the last five years, with 28 questions. AC Circuits has produced the most tough questions (2).

  1. 1An ac source of internal resistance is connected to a transformer. The ratio of the number of turns in the primary to the number of turns in27 May, 2025 (M)Transformers
  2. 2A coil of inductive reactance and a resistance are connected in series to a ac source. The time lag between voltage and current is26 May, 2025 (M)AC Circuits
  3. 3In a series LCR circuit, the voltages across the capacitor, resistor and inductor are in the ratio . If the voltage of the ac source in the 26 May, 2025 (E)AC Circuits
  4. 4If the voltage and current in an ac circuit are respectively and , then the power dissipated in the circuit is nearly24 May, 2025 (M)Alternating Current, Voltage and Power
  5. 5If a resistor of resistance , a capacitor of capacitive reactance and an inductor of inductive reactance are connected in series with an ac 23 May, 2025 (M)AC Circuits
  6. 6In a series resonant LCR circuit, for the power dissipated to become half of the maximum power dissipated, the current amplitude is23 May, 2025 (E)AC Circuits
  7. 7For better tuning of a series LCR circuit in a communication system, the preferred combination is22 May, 2025 (M)AC Circuits
  8. 8A resistor of and an inductor are connected in series to an ac source of frequency . If the power factor of the circuit is 0.6, then the ind22 May, 2025 (E)Quality and Power Factor
  9. 9The resonant frequency of an LC circuit is . If a dielectric slab of constant 16 is inserted completely between the plates of the capacitor,21 May, 2025 (M)AC Circuits
  10. 10In an LCR series circuit, if the potential differences across inductor, capacitor and resistor are and 40 V respectively, then the ac voltag21 May, 2025 (E)LCR Circuits
  11. 11An alternating current is given by A. The current will be23 May, 2024 (M)Alternating Current, Voltage and Power
  12. 12A 50 Hz AC circuit has a 10 mH inductor and a resistor in series. The value of capacitance to be placed in series in the circuit to make the22 May, 2024 (M)AC Circuits
  13. 13In the circuit shown in the figure, neglecting the source resistance, the voltmeter and ammeter readings respectively are22 May, 2024 (E)AC Circuits
  14. 14Two figures are shown as Fig. A and Fig. B. The time constant of Fig. A is and time constant of Fig. Bis . Then21 May, 2024 (M)AC Circuits
  15. 15A resistor of resistance , inductor of inductive reactance and a capacitor of capacitive reactance are connected in series to an a.c. source21 May, 2024 (E)AC Circuits
  16. 16A resistance of is connected to a source of an alternating potential . If is the time taken by the current to change from the peak value to 20 May, 2024 (M)Alternating Current, Voltage and Power
  17. 17An inductor and a resistor are connected in series to an ac source of voltage Volt. If the current in the circuit is ampere, then the resist20 May, 2024 (E)AC Circuits
  18. 18A series LCR circuit is shown in the figure. Where the inductance of 10 H , capacitance and resistance 60 are connected to a variable freque19 May, 2024 (E)AC Circuits
  19. 19In the figure, if A & B are identical bulbs, which bulb glows brighter18 May, 2024 (M)Alternating Current, Voltage and Power
  20. 20The shiny metal disk in the electric power meter (along type) rotates due to19 May, 2023 (M)Transformers
  21. 21An ac voltage of volt is applied to a pure inducfor of inductance . The current through the inductor in ampere is19 May, 2023 (M)Alternating Current, Voltage and Power
  22. 22An inductor of inductance , a capacitor of capacitance and a resistor of resistance are connected in series to an ac source. The quality fac18 May, 2023 (M)Quality and Power Factor
  23. 23A resistor of resistance , a capacitor of capacitive and an inductor of inductive reactance are connected in series to an ac source of . The18 May, 2023 (E)AC Circuits
  24. 24To heat the food containing water, the frequency of the microwaves used in microwave oven is18 May, 2023 (E)AC Circuits
  25. 25A resistor of , an inductor of and a capacitor of are connected in series to an ac source. The impedance of the circuit is minimum for a fre17 May, 2023 (M)AC Circuits
  26. 26An inductor and a resistor of are connected in series to an ac source of voltage volt. If the impedance of the circuit is , the average powe17 May, 2023 (E)AC Circuits
  27. 27A resistor of resistance and an inductor of inductive reactance are connected in series to an ac source. A capacitor of capacitive reactance16 May, 2023 (E)Parallel AC Circuits
  28. 28The frequency of ac at which capacitor and inductor will have same reactance is15 May, 2023 (M)AC Circuits
  29. 29The average power output of a point source of an electromagnetic radiation is . The maximum value of the rms value of the electric field at 15 May, 2023 (M)Alternating Current, Voltage and Power
  30. 30Capacitive reactance of a capacitor in an circuit is 6 . If the same capacitor is connected to an source of double the frequency, the capaci08 Jul, 2022 (M)Alternating Current, Voltage and Power
  31. 31An inductor of reactance and a resistor of resistance are connected in series to the terminals of (rms) AC source. The power dissipated in t08 Jul, 2022 (E)Alternating Current, Voltage and Power
  32. 32The current in the circuit given below is07 Jul, 2022 (M)AC Circuits
  33. 33A capacitor is connected to a , AC supply. The rms value of the current is07 Jul, 2022 (M)AC Circuits
  34. 34A circuit containing inductance of and a resistance of in series. If an voltage of and is applied to above circuit, then the current in the 07 Jul, 2022 (E)Alternating Current, Voltage and Power
  35. 35The impedance of an LR circuit with , and frequency is06 Jul, 2022 (M)AC Circuits
  36. 36Resonance frequency of series AC circuit is . Now inductance is reduced to times and capacitance is increased to 16 times, then the resonanc06 Jul, 2022 (E)AC Circuits
  37. 37capacitor is connected to a AC supply. Then the rms current of the circuit is06 Jul, 2022 (E)AC Circuits
  38. 38An circuit consists of a resistor, capacitor and a inductor connected in series with a AC supply. The angular frequency of the supply voltag05 Jul, 2022 (M)Alternating Current, Voltage and Power
  39. 39A inductor is connected to supply. The rms value of the current in the circuit is05 Jul, 2022 (E)AC Circuits
  40. 40A coil of inductance 0 . 1 H and resistance 110 is connected to a source of 110 V and 350 Hz . The phase difference between the voltage maxi04 Jul, 2022 (M)Alternating Current, Voltage and Power
  41. 41Capacitive reactance of a capacitor in an A C circuit is 3 k . If this capacitor is connected to a new A C source of double frequency, the c04 Jul, 2022 (E)AC Circuits
  42. 42A transformer works on the principle of25 Aug, 2021 (M)Transformers
  43. 43An AC source of angular frequency is fed across a resistor and a capacitor in series. The current flowing in the circuit found to be . Now t25 Aug, 2021 (E)Alternating Current, Voltage and Power
  44. 44117.An L-C resonant circuit contains a 400 pF capacitor and an inductor of 400 μH. It is coupled to an antenna. Wavelength of radiated elect25 Aug, 2021 (E)AC Circuits
  45. 45The current and emf through an inductance differ by phase by24 Aug, 2021 (E)Alternating Current, Voltage and Power
  46. 46The reactance of an inductor at is . The reactance of it at is23 Aug, 2021 (M)AC Circuits
  47. 47An circuit contains capacitor and a inductor. The frequency of electromagnetic radiation emitted by antenna coupled to the circuit is23 Aug, 2021 (M)AC Circuits
  48. 48In an -circuit containing only capacitance, the current23 Aug, 2021 (E)Alternating Current, Voltage and Power
  49. 49A 20 V AC is applied to a circuit consisting of a resistor and a coil with negligible resistance. If the voltage across the resistor is 12 V20 Aug, 2021 (M)Alternating Current, Voltage and Power
  50. 50A resonant frequency of a circuit is f . If the capacitance is made four times the initial value, then the resonant frequency will become19 Aug, 2021 (M)AC Circuits

Frequently Asked Questions

1.How many questions are available for Alternating Current?

This chapter includes 89 questions compiled from AP EAMCET papers spanning 2005 to 2025.

2.Are these questions only from AP EAMCET, or from other exams too?

These are AP EAMCET questions specifically for the Alternating Current chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Alternating Current an important chapter for AP EAMCET Physics?

Alternating Current has appeared in 18 of the 25 years of AP EAMCET papers covered here, with 89 questions across 80 papers - about one per paper it appears in.

4.What is the difficulty level of Alternating Current questions in AP EAMCET?

Of the 89 questions analysed for this chapter, 52% are easy, 43% moderate and 6% tough. 2022 had the most, with 12 questions.

5.Which topics in Alternating Current should I focus on?

These topics have carried the most weightage in Alternating Current:

  • AC Circuits - 41 questions (46%)
  • Alternating Current, Voltage and Power - 31 questions (35%)
  • Transformers - 8 questions (9%)
  • AC Circuits has produced the most tough questions (2).
6.Is Alternating Current's weightage in AP EAMCET going up or down?

Across all 80 papers analysed, Alternating Current has averaged about 1.1 questions per paper. In the last three years (2022–2024), that average has stayed about the same, at about 1.1 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.