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Physics - Alternating Current

Practise 319 MHTCET previous year questions on Alternating Current, compiled from papers spanning 2007 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty MHTCET tests.

Alternating Current has been asked in 17 of the 17 years of MHTCET papers analysed (2007–2026), with 319 questions in all. 43% of them were easy, 47% moderate and 10% tough. Most of its questions came from 2026, with 53 questions that year. In the last three years (2024–2026) it had 154 questions across 59 papers, about 2.6 per paper.

The chapter's 5 topics are not weighted equally: AC Circuits (162 questions, 51%), Alternating Current, Voltage and Power (97 questions, 30%), and Transformers (37 questions, 12%) have been asked the most. AC Circuits has also led over the last five years, with 124 questions. AC Circuits has produced the most tough questions (17).

  1. 1In the circuit shown charge q varies with time t as , where q is in coulomb and t is in second. At time second, voltage in volt will be20 Apr, 2026 (M)AC Circuits
  2. 2When an inductance ' ' and resistor ' ' are connected in series to V, Hz supply, a current of A flows in the circuit. The current lags behin20 Apr, 2026 (M)AC Circuits
  3. 3Which graph shows the correct variation of r.m.s. current ' ' with frequency ' ' of a.c. in case of series resonant circuit ?20 Apr, 2026 (M)AC Circuits
  4. 4In a series LCR circuit, the voltage across R is V, and . The angular frequency is rad s . At resonance, the voltage across ' ' is20 Apr, 2026 (M)AC Circuits
  5. 5A current of 4 A is flowing at 230 V in the primary coil of a transformer. If the voltage produced in the secondary coil is 2300 V and 40 % 20 Apr, 2026 (E)Transformers
  6. 6In a L-R circuit of 4 mH inductance and resistance, e.m.f. V is applied. The amplitude of current is20 Apr, 2026 (E)AC Circuits
  7. 7Given below are the two circuits, choose the correct option.20 Apr, 2026 (E)AC Circuits
  8. 8In an LCR series circuit an alternating voltage source of frequency is connected. The current leads the voltage by . The value of is20 Apr, 2026 (E)AC Circuits
  9. 9In an LCR circuit at resonance, the a.c. source current is A) maximum in a series LCR circuit only. B) maximum in a parallel LCR circuit onl19 Apr, 2026 (M)AC Circuits
  10. 10An alternating voltage volt is applied to a capacitor of capacity . The root mean square value of current in the circuit is19 Apr, 2026 (M)AC Circuits
  11. 11For a series LCR circuit inductive reactance is equal to resistance and also equal to twice the capacitive reactance . The impedance of the 19 Apr, 2026 (M)AC Circuits
  12. 12In series LCR circuit and impedance is . An r.m.s. voltage V, is applied across the circuit. The true power consumed in AC circuit is19 Apr, 2026 (E)AC Circuits
  13. 13When a.c. source is connected across a pure capacitor, the correct phase relation between current and emf is shown in figure.19 Apr, 2026 (E)Alternating Current, Voltage and Power
  14. 14In an a.c. circuit, a resistance R is connected in series with an inductance 'L'. If phase angle between voltage and current is , the value 18 Apr, 2026 (M)AC Circuits
  15. 15An a.c. source is applied to a series LR circuit with and power factor is . Now a capacitor with is added in series to LR circuit and power 18 Apr, 2026 (M)AC Circuits
  16. 16In an LCR series circuit, the potential difference across the terminals of the inductor, capacitor and resistor is 60 V, 30 V and 40 V respe18 Apr, 2026 (E)AC Circuits
  17. 17In the series LCR circuit shown in figure the impedance is18 Apr, 2026 (E)AC Circuits
  18. 18A series combination of resistor 'R' and capacitor 'C' is connected to an a.c. source of angular frequency ' '. Keeping the voltage same, if18 Apr, 2026 (E)AC Circuits
  19. 19A transformer has 120 turns in the primary coil and carries 5A current. Input power is one kilowatt. To have 560 V output, the number of tur17 Apr, 2026 (M)Transformers
  20. 20In LCR series circuit at resonance17 Apr, 2026 (M)AC Circuits
  21. 21The LC series resonant circuit produces a resonant frequency ' '. If L is tripled and 'C' is increased by 3C, the resonant frequency will be17 Apr, 2026 (M)AC Circuits
  22. 22The resistor ' ' inductance ' ' and capacitance ' ' are connected in series with an a.c. source. When 'L' is removed from the circuit, the p17 Apr, 2026 (M)AC Circuits
  23. 23In a series LCR circuit alternating e.m.f. and current are given by the equations and respectively. The average power dissipated in the circ17 Apr, 2026 (E)Alternating Current, Voltage and Power
  24. 24In an a.c. circuit with pure capacitance 'C' and a.c. source , the equation of instantaneous current is given by17 Apr, 2026 (E)AC Circuits
  25. 25In LCR circuit, at a particular angular frequency the capacitive reactance and inductive reactance is same. If the angular frequency is doub17 Apr, 2026 (E)AC Circuits
  26. 26A step down transformer has turns ratio 20:1. If 8V are applied across secondary then the primary current will be16 Apr, 2026 (M)Transformers
  27. 27An alternating e.m.f. is given by . In what time the e.m.f. will have half its maximum value, if 'e' Starts from zero?16 Apr, 2026 (M)Alternating Current, Voltage and Power
  28. 28With gradual increase in frequency of an a.c. supply, the impedance of an LCR series circuit16 Apr, 2026 (M)AC Circuits
  29. 29When a capacitor is connected in series LR circuit, the alternating current flowing in the circuit16 Apr, 2026 (M)AC Circuits
  30. 30An inductor of inductance is connected in series with a resistance, a variable capacitor and an a.c. source of 10 kHz. The value of capacita16 Apr, 2026 (E)AC Circuits
  31. 31Series LCR circuit containing an a.c. source of 100V has a inductor and a capacitor of reactance and respectively. If a resistance of is con16 Apr, 2026 (E)AC Circuits
  32. 32Alternating current of peak value A flows through the primary coil of a transformer. The coefficient of mutual inductance between primary an16 Apr, 2026 (E)Transformers
  33. 33A coil has inductive reactance H. The ratio of its reactance when it is first connected to an a.c. source and then to d.c. source is15 Apr, 2026 (M)Alternating Current, Voltage and Power
  34. 34Determine the frequency for which a capacitor has a reactance of .15 Apr, 2026 (M)Alternating Current, Voltage and Power
  35. 35A series LCR circuit is connected to an a.c. source of V, Hz. The circuit contains a resistance , an inductor of inductive reactance and cap15 Apr, 2026 (M)AC Circuits
  36. 36In an LCR series circuit, at resonance,15 Apr, 2026 (E)AC Circuits
  37. 37A series resonant circuit consists of an inductor 'L' and capacitor 'C' which produces resonant frequency 'f'. If 'L' is increased by '2L' a15 Apr, 2026 (E)AC Circuits
  38. 38An electric lamp connected in series with a capacitor and an a.c source is glowing with certain brightness. On reducing the frequency of sou15 Apr, 2026 (E)AC Circuits
  39. 39A resistor of 100 , inductor of self inductance H and a capacitor of unknown capacity are connected in series to an a.c. source of 200 V and13 Apr, 2026 (M)AC Circuits
  40. 40An alternating e.m.f. is given by . In what time the e.m.f. will have half its maximum value, if 'e' starts from zero? ( )13 Apr, 2026 (M)Alternating Current, Voltage and Power
  41. 41In series LCR resonant circuit, R=800 , C = 2 F and voltage across resistance is 200 V. The angular frequency is 250 rad/s. At resonance the13 Apr, 2026 (M)AC Circuits
  42. 42In series LCR circuit C = 2 uF, L=1 mH and R= 10 . What is the ratio of energies stored in the capacitor and inductor when maximum current f13 Apr, 2026 (M)AC Circuits
  43. 43In a series LR circuit with . Power factor is . If a capacitor of capacitance with is added to the circuit the power factor becomes . The ra13 Apr, 2026 (E)AC Circuits
  44. 44An inductor of mH, a capacitor of F and resistance are connected in series with a V ac source. If the current is in phase with the emf, the 13 Apr, 2026 (E)AC Circuits
  45. 45In the circuit shown, the ratio of the quality factor and the band width is (Given: band width = R/L)13 Apr, 2026 (E)AC Circuits
  46. 46In the circuit shown below, the ac source has voltage volt with rad/s. What will be the amplitude of the current?11 Apr, 2026 (M)AC Circuits
  47. 47In an AC circuit , . What is the power dissipated in the circuit? [ ]11 Apr, 2026 (M)Alternating Current, Voltage and Power
  48. 48An inductor of reactance , a capacitor of reactance , and a resistor of resistance are connected in series with an AC source of V, Hz. Avera11 Apr, 2026 (M)AC Circuits
  49. 49Alternating current of peak value A flows through the primary coil of a transformer. The coefficient of mutual inductance between primary an11 Apr, 2026 (E)Transformers
  50. 50An ideal transformer converts V a.c. to KV a.c. to transmit a power of KW. If primary coil has turns then alternating current in the seconda11 Apr, 2026 (E)Transformers

Frequently Asked Questions

1.How many questions are available for Alternating Current?

This chapter includes 319 questions compiled from MHTCET papers spanning 2007 to 2026.

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

These are MHTCET 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 MHTCET Physics?

Alternating Current has appeared in 17 of the 17 years of MHTCET papers covered here, with 319 questions across 104 papers - about 3 per paper it appears in.

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

Of the 319 questions analysed for this chapter, 43% are easy, 47% moderate and 10% tough. 2026 had the most, with 53 questions.

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

These topics have carried the most weightage in Alternating Current:

  • AC Circuits - 162 questions (51%)
  • Alternating Current, Voltage and Power - 97 questions (30%)
  • Transformers - 37 questions (12%)
  • AC Circuits has produced the most tough questions (17).
6.Is Alternating Current's weightage in MHTCET going up or down?

Across all 104 papers analysed, Alternating Current has averaged about 3.1 questions per paper. In the last three years (2024–2026), that average has stayed about the same, at about 2.6 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.