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JEE Advanced 2023 · Physics
2:45Q 12 / 30

A particle of mass m moves in a circular orbit of radius r in a central force potential V(r) = k·r². The time period of the orbit is proportional to:

Ar⁰
Br¹
Cr²
Dr³/²
68% accuracy2.4k attempts
Medium
Progress12 / 30 questions
10,000+
PYQs from 2017–2026
50+
Full-length mock tests
4 Subjects
Physics, Chemistry, Bio, Maths
100%
Authentic exam questions

How PrepZii works

Your complete preparation workflow

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1

Learn

Review formulas and concepts with digital handbooks

2

Practice

Solve chapter-wise PYQs from JEE & NEET past papers

3

Test

Take full-length timed mocks under real exam conditions

4

Analyze

Review accuracy, speed, and performance metrics

5

Improve

Target the weak chapters your analytics surface

6

Discuss

Resolve doubts with AI or peer study groups

Everything you need to prepare

Four focused tools. One distraction-free workspace.

PYQ

Practice

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  • Full-length mock tests
  • Chapter-wise drills
  • Custom test creation
Loop

Revise

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  • Saved important questions
  • Mistake revision engine
  • Quick concept recap
Data

Analyze

  • Granular performance analytics
  • Weak chapter detection
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Peer

Connect

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  • Doubt resolution
  • Global leaderboards

Why PrepZii

Built around real exam work, with AI that helps

PrepZii starts with verified previous year papers and focused exam workflows. Zi helps you understand, revise, plan, and improve without getting in the way of your preparation.

Verified PYQs

100% authentic questions from 2017–2026 with detailed step-by-step solutions.

Real exam UI

Practice in an environment that closely mirrors the actual CBT interface.

Zi — your study companion

Ask Zi to explain any question, suggest what to revise next, or help you understand a concept you're stuck on.

Habits that stick

Streaks, XP, and personalised revision plans built around your weak chapters and exam schedule.

Accuracy
88%
Weak chapter
Thermodynamics
Streak
14 days

Every subject. Every chapter.

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PH

Physics

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CH

Chemistry

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BIO

Biology

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MATH

Mathematics

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