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Physics - Alternating Current

Practise 20 BITSAT previous year questions on Alternating Current, compiled from papers spanning 2009 to 2024. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty BITSAT tests.

Alternating Current has been asked in 13 of the 16 years of BITSAT papers analysed (2009–2024), with 20 questions in all. 55% of them were easy, 45% moderate and 0% tough. Most of its questions came from 2024, with 3 questions that year. In the last three years (2022–2024) it had 5 questions across 5 papers, about 1 per paper.

The chapter's 4 topics are not weighted equally: AC Circuits (9 questions, 45%), Alternating Current, Voltage and Power (8 questions, 40%), and Quality and Power Factor (2 questions, 10%) have been asked the most. AC Circuits has also led over the last five years, with 4 questions.

  1. 1An alternating voltage volt is applied to a purely resistive load of . The time taken for the current to rise from half of the peak value to2024 (Memory Based Paper 1)Alternating Current, Voltage and Power
  2. 2In an ac circuit, an inductor, a capacitor and a resistor are connected in series with . Impedance of this circuit is :2024 (Memory Based Paper 2)AC Circuits
  3. 3Find the average value of current shown graphically from to .2024 (Memory Based Paper 3)Alternating Current, Voltage and Power
  4. 4In the given circuit, rms value of current (Irms) through the resistor is :2023 (Memory Based Paper 2)AC Circuits
  5. 5In the circuit shown in the figure, the source gives a voltage neglecting source resistance, the voltmeter and ammeter reading will be2022AC Circuits
  6. 6An alternating voltage is applied across a circuit. As a result, a current flows in it. The power consumed per cycle is2021Alternating Current, Voltage and Power
  7. 7For an RLC circuit driven with voltage of amplitude and frequency the current exhibits resonance the quality factor, is given by2021Quality and Power Factor
  8. 8In series combination of and with an A.C. source at resonance, if then impedence of the combination is2020AC Circuits
  9. 9A resistor R , an inductor L , a capacitor C and voltmeters V 1 , V 2 and V 3 are connected to an oscillator in the circuit as shown in the 2018AC Circuits
  10. 10A resistor of resistance , capacitor of capacitance and inductor of inductance are connected in parallel to AC power source of voltage . The2016AC Circuits
  11. 11A direct current of is superposed on an alternating current flowing through the wire. The effective value of the resulting current will be2015Alternating Current, Voltage and Power
  12. 12In the circuit shown below, the ac source has voltage volt with The amplitude of the current will be nearest to2015AC Circuits
  13. 13Voltage and current in circuit are given by volt, The power dissipated in the circuit is2014Alternating Current, Voltage and Power
  14. 14The impedance of a circuit consists of resistance and reactance. The power factor of the circuit is2012Quality and Power Factor
  15. 15The r.m.s. value of potential difference shown in the figure is2012Alternating Current, Voltage and Power
  16. 16Which one of the following curves represents the variation of impedance ( ) with frequency in series LCR circuit?2011Parallel AC Circuits
  17. 17An alternating voltage sin ot is appliedacross a circuit. As a result, a current flows in it. The power consumed per cycle is2010Alternating Current, Voltage and Power
  18. 18A resistance and inductance and a capacitor all are connected in series with an AC supply. The resistance of is 16 ohm and for a given frequ2010AC Circuits
  19. 19The instantaneous current from an a.c. source is . What is the rms value of the current?2009Alternating Current, Voltage and Power
  20. 20A coil has resistance 30 ohm and inductive reactance 20 ohm at frequency. If an ac source, of 200 volt, is connected across the coil, the cu2009AC Circuits

Frequently Asked Questions

1.How many questions are available for Alternating Current?

This chapter includes 20 questions compiled from BITSAT papers spanning 2009 to 2024.

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

These are BITSAT 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 BITSAT Physics?

Alternating Current has appeared in 13 of the 16 years of BITSAT papers covered here, with 20 questions across 15 papers - about one per paper it appears in.

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

Of the 20 questions analysed for this chapter, 55% are easy, 45% moderate and 0% tough. 2024 had the most, with 3 questions.

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

These topics have carried the most weightage in Alternating Current:

  • AC Circuits - 9 questions (45%)
  • Alternating Current, Voltage and Power - 8 questions (40%)
  • Quality and Power Factor - 2 questions (10%)
6.Is Alternating Current's weightage in BITSAT going up or down?

Across all 15 papers analysed, Alternating Current has averaged about 1.3 questions per paper. In the last three years (2022–2024), that average has fallen, at about 1.0 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.