Alternating Current Formula Sheet Class 12: Alternating Current is an important chapter from Class 12 Physics book that consists of a lot of concepts and important topics. Questions from this chapter are frequently asked in the exam, specially numercials. It is a short chapter and does not consist of plenty of formulas. Most of the formulas present in the chapter are elongated versions of basic formulas that you have already studied in younger classes. However, formula sheets or formula pages assist students in memorising formulas easily, carrying it along with them due to its portable nature, and refer to it whenever required. Constant viewing and reading of the formulas present on formula sheets makes it easier for students to learn them by heart and store it in their brain for longer duration of time. Here, you can find the Alternating Current formula sheet along with details about physical quantities, their symbols, units, dimensions, and more.
Alternating Current Class 12 Formula Sheet
Check the Class 12 Alternating Current important formulas below. We have ensured that all the formulas present in the chapter that could be useful for students in solving questions is present on this list. Students can save the formula sheet for future reference, if required. It is best to get a printout of the formula sheet to make it quite handy and easier to refer to.
- Voltage
, where vm is amplitude of oscillating potential difference and ω is angular frequency
- Current
, where vm is amplitude of oscillating potential difference and R is the constant
- Power
- Amplitude of Current
, where ωL is the inductive reactance
- Inductive Reactance
- AC voltage applied to a Series LCR Circuit
, where q is the charge on capacitor, i is the current at time t
- Phasor Relation
, where VL is voltage across inductor, VR is voltage across resistor, and VC is voltage across capacitor
- Impedance
- Resonant Frequency
- Power Factor
- Capacitive Reactance
- Phase Angle
- Current in Transformer
Class 12 Physics Alternating Current Physical Quantities
The following physical quantities are present in the Class 12 Physics Chapter 7 Alternating Current. Since students might have to use them on various occasions, it is important to note details such as symbol, unit, and dimensions of these quantities.
| Physical Quantity | Symbol | Dimensions | Unit |
| rms Voltage | V | [M L2 T–3 A–1] | V |
| rms current | I | [A] | A |
| Reactance: Inductive Capactive |
XL XC |
[M L2 T –3 A–2] [M L2 T –3 A–2] | |
| Impedance | Z | [M L2 T –3 A–2] | |
| Resonant Frequency | ωr or ω0 | [T-1] | Hz |
| Quality Factor | Q | Dimensionless | |
| Power Factor | Dimensionless |
For formula pages of Class 12 Physics chapters, check the link attached below. The formula sheets for all chapters from both volumes of the book have been provided below.
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