Alternating Current

Physics, HSSC-KPK Second Year. This chapter is split into 45 topics and has 1,149 practice questions. The topics covered are listed below, followed by 10 free sample questions from the chapter.

Topics in this chapter

1. AC through resistance 24 questions
2. RLC series circuit, impedance triangle and Q-factor 24 questions
3. Resonance, metal detectors and maximum power transfer 23 questions
4. AC through inductance and choke coil 30 questions
5. AC through capacitance 27 questions
6. Peak, average, and RMS values 20 questions
7. Alternating voltage and current basics 25 questions
8. Phase, phase difference and phasor representation 20 questions
9. Maxwell's equations, electromagnetic waves and ECG 27 questions
10. RL and RC series AC circuits 26 questions
11. Frequency, period and angular frequency calculations 30 questions
12. Instantaneous values of AC voltage and current 26 questions
13. Peak, RMS and peak-to-peak value conversions 30 questions
14. Heating effect and DC equivalent of an alternating current 27 questions
15. Phase angle and time difference between AC quantities 29 questions
16. Writing instantaneous equations of AC voltage and current 20 questions
17. Numerical problems on AC through a pure resistance 29 questions
18. Inductive reactance calculations 29 questions
19. Voltage and current equations for an inductor 22 questions
20. Capacitive reactance calculations 26 questions
21. Voltage and current equations for a capacitor 20 questions
22. Series R-L circuit: reactance, impedance and phase angle 30 questions
23. Series R-L circuit: current and voltage drops 29 questions
24. Power and power factor of a series R-L circuit 24 questions
25. Series R-C circuit: reactance, impedance and phase angle 28 questions
26. Series R-C circuit: current and voltage drops 28 questions
27. Power and power factor of a series R-C circuit 22 questions
28. Series R-L-C circuit: net reactance and impedance 30 questions
29. Series R-L-C circuit: current and voltage drops 28 questions
30. Series R-L-C circuit: phase angle and nature of the circuit 28 questions
31. Power and power factor of a series R-L-C circuit 24 questions
32. Worked example variations for A.C. circuits (Examples 15.5-15.7) 21 questions
33. Resonant frequency of a series R-L-C circuit: calculations 28 questions
34. Capacitance or inductance needed to tune a circuit to resonance 23 questions
35. Current, voltages and power at series resonance 28 questions
36. Q-factor and voltage magnification at resonance 26 questions
37. How resonant frequency changes with L and C 23 questions
38. Maximum power transfer: calculations 30 questions
39. Induced electric field and displacement current: calculations 26 questions
40. Wavelength and frequency of electromagnetic waves: calculations 25 questions
41. Identifying the region of the electromagnetic spectrum from wavelength 30 questions
42. Sources of electromagnetic radiation 23 questions
43. Uses and hazards of electromagnetic radiation 20 questions
44. Maxwell's equations: concepts and reasoning 21 questions
45. Electrocardiogram (ECG): detailed reasoning 20 questions