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Formula Sheet

Alternating Current — Formula Sheet

Madhya Pradesh Board · Class 12 · Physics

14 formulas from Alternating Current (Madhya Pradesh Board Class 12 Physics) on one page, grouped by topic. Covers Introduction and Basic Ideas, AC.

110 questions76 flashcards14 formulas & key relations5 concepts

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A graph showing the instantaneous voltage and current waveforms in a purely resistive AC circuit, demonstrating that they are in phase with each other.
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14 Entries · 7 Sections

Formulas and Key Relations

2. AC Voltage and Current in a Resistor

v = v_m sin ωt

i = i_m sin ωt

i_m = v_m / R

I = i_m/√2 = 0.707 i_m

V = v_m/√2 = 0.707 v_m

3. Pure Inductor in AC

X_L = ωL

Average power over a cycle = 0

4. Pure Capacitor in AC

X_C = 1/ωC

Series LCR Circuit, Impedance, and Resonance

Impedance is Z = √(R² + (X_C - X_L)²).

i = i_m sin ωt and i_m = v_m/R.

I = i_m/√2 and V = v_m/√2.

Key relations

The average power is P = I^2R = VI.

The current is i = i_m sin(ωt − π/2), and i_m = v_m/X_L where X_L = ωL.

The current is i = i_m sin(ωt + π/2), and i_m = v_m/X_C where X_C = 1/ωC.

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Frequently Asked Questions

What are the important topics in Alternating Current for Madhya Pradesh Board Class 12 Physics?
Key topics in Alternating Current include Introduction and Basic Ideas, AC Applied to a Resistor, AC Applied to an Inductor and a Capacitor, Series LCR Circuit, Impedance, and Resonance. Study these first, then practise questions on each for the Madhya Pradesh Board Class 12 board exam.
How many formulas are in Alternating Current?
This sheet lists 14 formulas from Alternating Current, grouped by topic. Learn what each symbol stands for so you can apply the formula, not just recall it.
How should I revise Alternating Current for the Madhya Pradesh Board Class 12 board exam?
Learn the core ideas first, then work through the 110 practice questions on Alternating Current. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Alternating Current

All Madhya Pradesh Board Class 12 Physics Formula Sheet

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