Formulas You’ll Forget: 2 PW Videos to Revise All Physics Formulae Tonight

With the CBSE Class 12 Physics Board Exam 2026 approaching on 20 February 2026, students often feel nervous, not because they don’t understand Physics, but because they are afraid of forgetting formulas, laws, and definitions during the exam.

Physics in Class 12 is highly formula-based. Even if your concepts are clear, missing one formula, law, or definition can reduce your marks.

At this final stage, your focus should be:

• Quick formula revision

• Revising all important laws

• Strengthening definitions

• Avoiding silly mistakes

If you are short on time, these 2 PW videos can help you revise the entire formula and law-based portion of Physics in one focused session.

Why Formula & Law Revision Is Very Important Before Boards

In the CBSE board exam:

• 2-mark questions often ask direct definitions or laws.

• 3-mark questions require writing proper statements of laws.

• 4–5 mark numericals require correct formulas.

• Derivations start from basic laws and equations.

Many students lose marks because they:

• Forget the exact statement of a law.

• Mix up similar formulas.

• Write incomplete definitions.

• Forget units and symbols.

This is why revising formulas along with laws and definitions is extremely important.

Physics Formula Marathon (Boards)

This video is specially designed for last-minute board revision. It focuses on revising all important formulas from every major chapter in a structured and fast way.

It covers formulas from:

Electrostatics

• Coulomb’s Law formula

• Electric field equation

• Electric potential

• Capacitance

• Energy stored in capacitor

Current Electricity

• Drift velocity

• Ohm’s Law

• Resistance combination

• Kirchhoff’s Laws equations

• Potentiometer formula

Magnetism & Moving Charges

• Biot–Savart Law

• Ampere’s Circuital Law

• Force on a moving charge

• Radius of a charged particle in a magnetic field

Electromagnetic Induction

• Magnetic flux

• Faraday’s Law equation

• Self-inductance

• Mutual inductance

• Energy stored in the inductor

Alternating Current

• RMS value relation

• Inductive reactance

• Capacitive reactance

• Impedance formula

• Resonance condition

• Power factor

Optics

• Mirror formula

• Lens formula

• Magnification

• Refraction formula

Modern Physics

• Photoelectric equation

• Bohr’s radius

• Energy level formula

• Radioactive decay law

Semiconductors

• Diode current equation

• Rectifier efficiency

• Logic gate relations

This formula marathon helps in:

• Quick recall

• Reducing confusion

• Improving speed in numericals

• Strengthening memory before sleeping

It is perfect for revising the entire syllabus formulas in one go.

All Laws & Definitions

This video is equally important because Physics board exams often ask direct theory questions.

It includes:

Important Laws

• Coulomb’s Law

• Gauss’s Law

• Ohm’s Law

• Kirchhoff’s Laws

• Biot–Savart Law

• Ampere’s Law

• Faraday’s Laws

• Lenz’s Law

• Laws of reflection and refraction

• Einstein’s photoelectric equation

Important Definitions

• Electric flux

• Electric potential

• Capacitance

• Drift velocity

• Magnetic flux

• Self-inductance

• Mutual inductance

• RMS value

• Power factor

• Threshold frequency

In board exams, sometimes questions are asked like:

• State and explain Faraday’s law.

• Define electric flux.

• State Kirchhoff’s current law.

• Write the statement of Ohm’s law.

If definitions are incomplete, marks are deducted.

This video ensures:

• You remember the correct wording.

• You write proper statements.

• You avoid missing keywords.

• You score full marks in short-answer questions.

How to Use These 2 Videos Tonight Before CBSE Class 12 Physics Exam 2026

Follow this smart revision strategy:

Step 1: Watch Formula Marathon First

Revise all formulas chapter-wise.

Step 2: Write Important Formulas in One Sheet

Prepare a final revision sheet.

Step 3: Watch All Laws & Definitions

Focus on exact statements.

Step 4: Speak the Laws Out Loud

This improves memory retention.

Step 5: Solve 5–10 Board-Level Questions

Apply formulas immediately.

Most Commonly Forgotten Things in Physics

Students usually forget:

• RMS and peak value relation

• Transformer formula

• Resonance condition

• Sign convention in optics

• Exact statement of Gauss’s Law

• Difference between self and mutual inductance

• Photoelectric equation constants

These two videos help you revise all of these in one focused session.

Why This Revision Can Increase Your Board Marks

CBSE follows step-wise marking. Even if the final answer is wrong, writing:

• Correct formula

• Correct law statement

• Proper definition

Clear recall of formulas and laws helps in:

• Faster problem-solving

• Writing clean derivations

• Managing exam time

• Reducing panic

Confidence increases automatically when formulas are fresh in your mind.

Final Advice Before 20 February 2026

Now is not the time to study new chapters.

Instead:

• Revise formulas daily.

• Revise laws and definitions carefully.

• Practice previous year questions.

• Sleep properly before exam day.

If you revise through these two PW videos tonight - Physics Formula Marathon (Boards) and All Laws & Definitions, you can walk into the exam hall feeling prepared and confident.