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Moment of inertia of a solid sphere ka formula samjhao, JEE trick ke saath
Solid sphere about its diameter:
I = ⅖ MR²
Slice the sphere into thin discs and add ½ r² dm for each one.
A hollow sphere is different: ⅔ MR².
See how a mentor answers
Pick an exam. This is the kind of answer you get — short, step by step, with the exam trap marked.
Fundamental Rights vs DPSP — what is the real difference?
FRs: Part III (Art. 12–35). DPSPs: Part IV (Art. 36–51).
FRs are justiciable — you can go to court for them.
DPSPs are not justiciable, but guide the State in making laws.
Minerva Mills (1980): balance between the two is part of the basic structure.
Aditi
GS 1-4, Prelims + Mains, answer writing, Ethics case studies.
What this mentor knows
- Polity, History, Geography, Economy, Ethics
- Laxmikanth, Spectrum, NCERTs, Economic Survey
- Prelims facts and Mains answer structure
A ball is thrown up at 20 m/s. What is its maximum height? (g = 10)
At the highest point, v = 0.
Use v² = u² − 2gh.
0 = 400 − 20h → h = 20 m
Bonus: time to reach the top = u / g = 2 s
Arjun
PCM concepts, step-by-step numericals, shortcuts and JEE Advanced level problems.
What this mentor knows
- Physics, Chemistry, Mathematics
- NCERT, HC Verma level problems
- Shortcuts after the full method
Give me a trick to remember the phases of mitosis.
Order: Prophase → Metaphase → Anaphase → Telophase
Trick: "PMAT — Please Make Another Tea"
Metaphase: chromosomes line up in the middle (equator).
Anaphase: sister chromatids move Apart.
Riya
NCERT-line-by-line Biology, mnemonics, diagrams explained, NEET physics & chemistry.
What this mentor knows
- Biology, Physics, Chemistry
- NCERT line by line
- Mnemonics, diagrams and NEET traps
How do I find 15% of 240 in five seconds?
10% of 240 = 24
5% is half of that = 12
15% = 24 + 12 = 36
Same trick works for 15% of anything.
Pooja
Speed maths, reasoning tricks, static GK and English for SSC.
What this mentor knows
- Quant, Reasoning, English, GK
- Speed tricks and percentage tables
- Previous-year question patterns
What is the repo rate, in simple words?
Repo rate = the rate at which RBI lends money to banks for a short time.
Banks give government securities as security.
Repo ↑ → loans become costlier → inflation cools down.
It is decided by RBI's Monetary Policy Committee (6 members).
Rohit
Puzzles, DI, banking awareness and descriptive writing for PO/Clerk.
What this mentor knows
- Puzzles, DI, English, Banking Awareness
- RBI and monetary policy basics
- Descriptive writing for PO exams
Balance this equation: Fe + H₂O → Fe₃O₄ + H₂
Fe: 3 on the right, so write 3Fe on the left.
O: 4 on the right, so write 4H₂O.
H: now 8 on the left, so write 4H₂.
3Fe + 4H₂O → Fe₃O₄ + 4H₂
Dev
NCERT solutions, chapter explanations and board-exam answer writing.
What this mentor knows
- Maths, Science, Social Science, English
- NCERT exercises solved step by step
- How to write full-mark board answers
Everything you study with, in one place
One account and one wallet for doubts, notes, news, practice and answer writing.
Expert AI Mentors
13 exam-specialist mentors for UPSC, PCS, JEE, NEET, SSC, Banking, CLAT, CAT, GATE, CA, CUET, NDA and school boards.
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Live headlines turned into UPSC-style notes: Prelims facts, Mains analysis, way forward and practice questions.
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Why does India get rain from the south-west monsoon?
1Short answer: summer heats the land more than the sea, so moist sea winds blow towards the land.
21. Thar desert and north India heat up → low pressure.
2. Indian Ocean stays cooler → high pressure.
3. Winds move from high to low, picking up moisture.
3Example: Kerala gets the first showers around 1 June.
4Exam angle: El Niño years often mean a weaker monsoon.
5Quick check: why does Tamil Nadu get rain in winter?
The first line answers the question, so you never hunt for it.
Each step builds on the last — no jumps.
Concepts are tied to places and things you already know.
How it is asked, and the trap examiners like to set.
One small question at the end to make it stick.
Try a 4-question quiz right now
No login needed. Inside the app, you can make quizzes like this on any topic, in any language.
Practice that explains itself
- Questions in the real exam style
- Instant right/wrong with a reason
- Score, time and accuracy saved
- One click to discuss mistakes with your mentor
Your answer sheet, checked like an examiner would
Click a photo of your handwritten answer. You get marks, the red-pen comments and a model answer.
Q. Discuss the features of Indian federalism. (150 words, 10 marks)
India is a union of states with a strong centre. ✓
Powers are divided in the 7th Schedule —
Union, State and Concurrent lists.
Single constitution, single citizenship.
Hence India is quasi-federal.
Marks breakdown
You also get: demand of the question, strengths, gaps, 5–7 tips and a model answer within the word limit.
Answer EvaluationToday's news, turned into exam notes
Pick any headline. You get Prelims facts, Mains analysis, the way forward and practice questions — with sources when live search is on.
RBI keeps the repo rate unchanged, says inflation is easing
The Monetary Policy Committee voted to keep the policy rate unchanged. The central bank said food prices had cooled and growth remained steady, while global risks continued.
My notes
GS-III: Economy — Monetary policy
• Prelims: MPC = 6 members, chaired by RBI Governor
• Mains: inflation targeting, transmission to loans
• Way forward: faster transmission, food supply chains
? PYQ-style: Critically examine inflation targeting. (150 words)
A mentor for each exam
Every mentor knows one exam well: its syllabus, the standard books and how questions are asked.
Government jobs and defence
P PoojaSSC CGL / CHSL / MTS R RohitBanking (IBPS / SBI / RBI) R RanveerNDA / CDS / AFCATLaw, management and CA
M MeeraCLAT & Law Entrance K KabirCAT & MBA Entrance A AnjaliCA Foundation / InterLearn in the language you think in
Tap a language to see the same idea written in it. Every mentor can answer in all 14, and you can speak your question too.
Photosynthesis, in one line
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Things students ask every day
Any subject, any level. If it is on your syllabus, you can ask it.
Explain Article 356 with recent examples
Aditi →
Why is the sky blue? Explain like I am 12
Arjun →
Make me a 90-day NEET revision plan
Riya →
Shortcut for CAT time-speed-distance
Kabir →
Quiz me on Mughal history, 10 questions
Aditi →
Write a model answer on women in the workforce
Aditi →
Kirchhoff's laws in Hinglish please
Arjun →
Difference between GDP and GNP with a table
Rohit →
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Which AI powers eAdhyapak?
Anthropic's Claude models — among the most capable and careful AI models available — guided by exam-specific mentor instructions.
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AI is very good but can make mistakes. Mentors are instructed not to guess and to flag uncertainty — still, verify important facts from standard books before exams.
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