NCERT-aligned · Classes 8–12

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And the report card in the parent's.

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Mapped to the NCERT books your child actually studies from

NCERTClasses 8–101st & 2nd PUCMathematicsSciencePhysicsChemistryBiologyComputer ScienceHistoryGeographyCivicsEconomicsEnglish · हिंदी · ಕನ್ನಡ

The problem

What you've been paying for

School feesPaid
Tuition or coachingPaid
Guides and reference booksPaid

What you've been getting

silence.

No updates. No signal. Nothing until the report card.

For the student

Everything a chapter needs, in one place.

One teacher, one speed, forty students, so the doubt never gets asked. It's 10pm, the doubt is now, and the only thing available is the textbook.

Ten ways into every chapter, read it, watch it, hear it, map it, drill it, test it.
An AI tutor on every page that already knows the chapter you're on. Available at 10pm.
Audio and video in English, Hindi and Kannada, so revision fits into a bus ride.
Streaks, goals and certificates that make coming back tomorrow the easy choice.

For the parent

Proof it's working, long before the result.

Thousands per subject per year, and no evidence any of it is landing. The first honest signal is the report card, and by then the term is gone.

A 0 to 100 readiness score per subject, recomputed every day from real study data.
A digest every Sunday morning, hours, chapters, quiz scores, the weak topic, what to say.
Alerts while it's still fixable, a score drop, three quiet days, a streak worth praising.
Set a test yourself from any chapter, and see how they did question by question.

So StaxED is two products sharing one spine:

the student gets the tools, the parent gets the truth.

Smart textbook and AI tutor

Tired of the whole long chapter?

Your NCERT book, with a summary beside every section.

Get the gist, instantly.

Tap a section, read its summary. Read less, remember more.

Select a line. Ask about it.

The AI tutor already sees the line and its page.

Revise in two minutes.

Flashcards for the formulas and facts that slip away.

Practise like it's exam day.

Auto-graded MCQs with an explanation after every answer.

Watch it add up.

Streaks, a weekly goal with a real reward, and parents see it too.

Tired of reading the whole long chapter?

Your exact NCERT book on screen, with a short summary waiting beside every single section.

Get the gist, instantly.

Tap any section and read a summary written from that very page. Read less, remember more.

Don't get a line? Select it. Ask it.

Highlight any sentence and tap Ask AI. The tutor already sees the exact line and the page it came from, so you never explain the context.

app.staxed.in/study/physics/moving-charges/textbook

Smart TextbookMoving Charges and Magnetism100%12 / 28

PhysicsMoving Charges and Magnetism · 113

4.2.1 Sources and fields

Before we introduce the magnetic field B, recall what we learnt about the electric field E. The interaction between two charges happens in two stages. The charge Q, the source of the field, produces an electric field E around it. A second charge q placed in this field feels a force F = qE.

Like the electric field, the magnetic field has a source: moving charges, or currents. It also obeys the principle of superposition, so the field of several sources is the vector sum of the field of each one.

4.2.2 Magnetic Field, Lorentz force

Let us suppose that there is a point charge q moving with velocity v and located at position r, in the presence of both an electric field E and a magnetic field B. The force on this charge is the sum of an electric part and a magnetic part.

F = q [ E(r) + v × B(r) ] ≡ F_electric + F_magnetic(4.3)

The magnetic force on a moving charge is always normal to both the velocity and the magnetic field, so it can turn the charge but never change its speed.Ask AI about this This has two immediate consequences. A charge at rest feels no magnetic force at all, and a magnetic field does no work on a moving charge.

Fig. 4.2 Direction of the magnetic force on a moving charge.

The unit of magnetic field follows from the same expression. If a charge of one coulomb moving at one metre per second normal to the field feels a force of one newton, the field is one tesla.

We can now see why a magnetic field bends the path of a charged particle without speeding it up or slowing it down, which leads directly to the circular motion studied in the next section.

04 / 06

Revise in two minutes.

Flip cards for formulas, definitions and the facts that slip away, built from the same chapter.

05 / 06

Practise like it's exam day.

Auto-graded MCQs with an explanation after every answer, and a score that tells you where you stand.

06 / 06

Watch it add up.

Streaks with milestones at 7, 14, 30, 60 and 100 days. A weekly goal with a reward you agree on together. One daily question from the topics they keep getting wrong. And parents see all of it.

Flashcards · Ch 4Card 4 of 28

Question

Which way does the magnetic force on a moving charge point?

Answer

Perpendicular to both v and B.

F = q(v × B). The right-hand rule gives the exact direction.

← PrevFlipNext →

Chapter quizQuestion 8 of 10

A proton moves parallel to a uniform magnetic field. The force on it is:

AMaximum, along the field

BZero

CPerpendicular to the field

DIt depends on the speed

✓ v × B is zero when v is parallel to B.

Your score8/10

This week🔥 14-day streak

78%

7143060100day milestones

Weekly goal · 5 of 7 days🎁 New cricket bat

TODAY'S QUESTIONWhy does a magnetic field do no work on a moving charge?

PParent update: Aarav finished Physics Ch 4 with 8/10 🎉

Flashcards · Ch 4Card 4 of 28

Question

Which way does the magnetic force on a moving charge point?

Answer

Perpendicular to both v and B.

F = q(v × B). The right-hand rule gives the exact direction.

← PrevFlipNext →

Chapter quizQuestion 8 of 10

A proton moves parallel to a uniform magnetic field. The force on it is:

AMaximum, along the field

BZero

CPerpendicular to the field

DIt depends on the speed

✓ v × B is zero when v is parallel to B.

Your score8/10

This week🔥 14-day streak

78%

7143060100day milestones

Weekly goal · 5 of 7 days🎁 New cricket bat

TODAY'S QUESTIONWhy does a magnetic field do no work on a moving charge?

PParent update: Aarav finished Physics Ch 4 with 8/10 🎉

Smart Textbook− 100% +

PhysicsMoving Charges and Magnetism · 113

4.2.1 Sources and fields

4.2.2 Magnetic Field, Lorentz force

F = q [ E(r) + v × B(r) ] ≡ F_electric + F_magnetic(4.3)

Fig. 4.2 Direction of the magnetic force on a moving charge.

The unit of magnetic field follows from the same expression. If a charge of one coulomb moving at one metre per second normal to the field feels a force of one newton, the field is one tesla.

We can now see why a magnetic field bends the path of a charged particle without speeding it up or slowing it down, which leads directly to the circular motion studied in the next section.

Learn your way

One chapter. Ten ways to make it stick.

Visual learner? Start with the mind map. Learn by listening? Play the podcast on the bus. Cramming tonight? Slides and flashcards.

Smart textbookThe real NCERT chapter, with a summary of every section in the sidebar.01

AI TutorAsk anything about the chapter. It nudges, it doesn't just hand over answers.02

Concept notesTight, exam-focused revision notes for the whole chapter.03

Audio lessonThe chapter as a podcast, in English, Hindi or Kannada.04

Video overviewA guided walkthrough for the concepts that are easier seen than read.05

Mind mapThe whole chapter as one expandable map, so you see how it connects.06

FlashcardsFlip cards for formulas, definitions and the facts that slip away.07

SlidesSkim the entire chapter in about five minutes.08

QuizAuto-graded MCQs with an explanation after every answer.09

Question bankPractice questions and previous-year papers, worked out.10

👆Swipe or scroll

Your language

Concepts land easiestin the language you think in.उस भाषा में जिसमें आप सोचते हैं।in the language you think inನೀವು ಯೋಚಿಸುವ ಭಾಷೆಯಲ್ಲಿ.in the language you think in

English, Hindi and Kannada, built for families where school happens in English but understanding happens at home. Press play, this is a real StaxED chapter podcast.

Chapter podcastStaxED audio lesson · English

0:000:00

English, Hindi and Kannada, built for families where school happens in English but understanding happens at home.

Listen like SpotifyEvery chapter as audio, with speed control. Revision on the bus, no screen needed.

Watch it explainedChapter walkthroughs in all three languages, for the concepts that need showing.

Formulas that render like a textbookMaths and science notation typeset properly, not a broken webpage with symbols missing.

The parent portal

Finally, proof. And a heads-up the moment they slip.

A live dashboard for each child, with a 0 to 100 exam readiness score per subject, and whether they are ahead or behind the pace the year demands.

Readiness score

A score you can actually trust.

Computed every night from coverage, quiz mastery, recency and consistency. It moves slowly on purpose, it rewards steady work rather than one panicked weekend.

Alerts and the Sunday digest

"Behind pace" is the sentence no report card sends you in September.

A quiz average that drops, three quiet days, a streak worth praising. One email a day at most, so the important one never gets buried. You see topics, never transcripts.

Aarav · Class 10Exam readiness, updated last nightLive

72Science

Mathematics64

Science72

Social Science58

What the score is made of

Coverage

35%

Quiz mastery

35%

Recency

15%

Consistency

15%

Behind pace in Science. Ch 6 needs revision.Assign a test

Sunday digest: 6h 20m, 4 chapters, 2 quizzes.Read

7-day streak. Worth praising.

Why we built it

StaxED isn't more content. It's a system.

Content is everywhere. YouTube has explanations, PDFs have notes, random apps have quizzes. The problem is that none of it is connected, none of it is structured, and none of it knows what chapter your child is on.

One chapter, one place

Open the app, pick the chapter, and everything needed to learn it, revise it and test on it is already there. No switching, no lost place.

Built for the student, not the syllabus

A lot of edtech is designed to impress educators. Every tool here exists because a student needs it. If it doesn't make studying easier or faster, it isn't in the app.

Exam-relevant from day one

Board exams were the starting point, not an afterthought. The PYQ question bank, the chapter quizzes and the revision flow are all built around what the paper actually asks.

A system takes a student from first read to exam ready, chapter by chapter. That is the difference, and it is the whole reason StaxED exists.

The whole syllabus

Not "important questions." The whole syllabus.

Mapped to the NCERT books your child actually studies from, so chapter names match their textbook, in the order their teacher teaches them.

5Classes covered, 8 to 12

10Ways to study each chapter

350+Chapters, growing weekly

3Languages for audio and video

Classes 8–10NCERT

MathematicsScienceHistoryGeographyCivicsEconomics

Class 11 & 121st & 2nd PUC

MathematicsPhysicsChemistryBiologyComputer Science

For Classes 10 and 12, Board Exam Mode, a countdown, a revision plan and sample papers.

The maths that matters

What families pay today, and what they get for it.

Private tuitionper subject, per year

₹18,000–60,000

Coaching instituteper year

₹40,000–1,00,000+

StaxEDevery subject in their class, 12 months

₹2,999

Typical yearly costs. The striped part is the upper end of the range.

That's about ₹250 a month, for every subject rather than one.

Compared on	Private tuition	Coaching institute	StaxED
Covers	1 subject	1–2 streams	Every subject in their class
Timing	Fixed slots	Fixed batches	24×7, exam night included
Doubts	Next class	If you dare ask	Answered on the spot*
Teaching style	One	One	Ten modes per chapter
Your visibility	A word at pickup	A PTM per term	Live score plus weekly report
Typical yearly cost	₹18,000–60,000 per subject	₹40,000–1,00,000+	₹2,999 for 12 months

Free to try

₹0

Browse the full syllabus and open a free chapter, no account and no card.

A free chapter to explore
All ten study modes on it
Installs from the browser like an app

Open a free chapterThe AI tutor needs a subscription even on free chapters, because every message has a real cost.

Everything included · Annual plan

₹2,999for 12 months

That's about ₹250 a month, for every subject rather than one.

Every chapter, every subject in their class
All ten study modes, plus the AI tutor*
Full parent portal: readiness, alerts, weekly digest
Parent-assigned tests, marked and reviewable
Board Exam Mode for Class 10 and 12

Get startedNo auto-renewal. One student, one class, 365 days from activation. *AI features are subject to fair-use limits.

For schools and coaching centres

Run StaxED for your whole institution, under your own brand.

The same chapter-wise stack, deployed for your students with your identity on it, plus faculty and admin visibility into engagement, progress and assessment across classes.

Explore for institutions →

FAQ

Questions parents actually ask.

It's the first screen time you can actually see: every minute tracked, every topic visible, and the app flags it when too much studying is happening late at night. No ads, no feed, no strangers, nothing designed to keep them scrolling.

It doesn't try to. Keep the teacher and the tuition you trust. StaxED fills the gaps around them: the 10pm doubt, the revision no one supervises, the practice, and the proof that any of it is working.

That's the honest risk with every study app, which is why the free chapter exists. Streaks, a weekly goal with a reward you choose together, and a dashboard that shows you the truth within a week. Try it tonight and watch their reaction before you pay.

NCERT-aligned content for Classes 8, 9 and 10, plus 1st and 2nd PUC (Classes 11 and 12) including Physics, Chemistry, Biology and Computer Science. You subscribe for one class and every subject in it unlocks.

No. There is no auto-debit mandate and no automatic renewal anywhere in the product. Access runs 365 days from activation; continuing after that means choosing to buy again.

Content and data are hosted in India and delivered through private, short-lived links. Payments are handled and verified by Razorpay. Nothing is sold to anyone. And parents see topics, scores and time, never their child's actual tutor conversations.

Open one free chapter today.
Decide after that.

A free chapter to be sure, and two minutes to start. The boards are coming either way, walk in knowing they're ready.

Open a free chapter →

The coaching institutein the student's pocket.

Everything a chapter needs, in one place.

Proof it's working, long before the result.

the student gets the tools, the parent gets the truth.

Tired of the whole long chapter?

Get the gist, instantly.

Select a line. Ask about it.

Revise in two minutes.

Practise like it's exam day.

Watch it add up.

Tired of reading the whole long chapter?

Get the gist, instantly.

Don't get a line? Select it. Ask it.

Revise in two minutes.

Practise like it's exam day.

Watch it add up.

One chapter. Ten ways to make it stick.

Concepts land easiestin the language you think in.उस भाषा में जिसमें आप सोचते हैं।in the language you think inನೀವು ಯೋಚಿಸುವ ಭಾಷೆಯಲ್ಲಿ.in the language you think in

Finally, proof. And a heads-up the moment they slip.

A score you can actually trust.

"Behind pace" is the sentence no report card sends you in September.

StaxED isn't more content. It's a system.

One chapter, one place

Built for the student, not the syllabus

Exam-relevant from day one

Not "important questions." The whole syllabus.

Classes 8–10NCERT

Class 11 & 121st & 2nd PUC

What families pay today, and what they get for it.

Run StaxED for your whole institution, under your own brand.

Questions parents actually ask.

Open one free chapter today.Decide after that.

Open one free chapter today.
Decide after that.