JEE Magnetism Quiz
Chapter-wise practice on magnetic force on charges and currents, fields from wires, loops and solenoids, torque on current loops, and magnetic materials.
Skill map
Levels in this jee magnetism quiz
Every question is generated fresh by AI and calibrated to your level - clear a level and the next one gets harder. Miss one and the AI tutor explains Magnetism until it sticks, then aims a follow-up at the gap. Want to grind one level? Start the quiz and type that sub-topic as your own.
Exam focus
How Magnetism is asked
Direction-heavy rather than algebra-heavy: most of the difficulty is in vector directions rather than in the magnitudes. Because of that, the fastest improvement usually comes from drilling the right-hand rule until it is automatic rather than from working more numerical problems.
Cheat sheet
Magnetism formulas worth memorising
| Quantity | Formula |
|---|---|
| Force on a moving charge | F = qvB sinθ |
| Force on a current-carrying wire | F = BIL sinθ |
| Field of a long straight wire | B = μ₀I / 2πr |
| Field at the centre of a loop | B = μ₀I / 2R |
| Field inside a solenoid | B = μ₀nI |
| Radius of a circular path | r = mv/qB |
| Torque on a current loop | τ = NIAB sinθ |
Marks lost here
Common mistakes in Magnetism
- Forgetting that the magnetic force does no work. It is always perpendicular to velocity, so it changes direction but never speed - which is why a charged particle in a uniform field moves in a circle at constant speed.
- Using B = μ₀I/2R for a long wire or μ₀I/2πr for a loop centre. The two expressions look similar and are routinely swapped under time pressure.
- Assuming a current-carrying wire always experiences a force in a magnetic field. If the wire is parallel to B, sinθ is zero and so is the force.
- Getting the right-hand rule backwards for a negative charge. The rule gives the direction for conventional positive current; for an electron the force is opposite.
- Treating n in B = μ₀nI as the total number of turns. It is turns per unit length, so a question quoting total turns and solenoid length needs that division first.
Game rules
How a round works
- 01Spawn
Press play - the AI generates Magnetism questions in seconds.
- 02Level up
Answer to earn XP and build a streak. Difficulty adapts to your accuracy and speed.
- 03Learn or lose
Every answer - right or wrong - gets an AI tutor explanation. Wrong answers respawn as follow-ups.
Leaderboard
Magnetism high scores
Next challenges
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Player's guide
JEE Magnetism Quiz - FAQs
Why does a magnetic field not change a particle's speed?
Because the force qv × B is always perpendicular to the velocity, so it does no work on the particle. It changes the direction of motion continuously while the kinetic energy stays exactly constant.
How do I decide the direction of the magnetic field around a wire?
Point your right thumb along the conventional current and your fingers curl in the direction of B. The field forms closed circles around the wire, which is why it has no beginning or end - and why there are no magnetic monopoles.
Is the jee magnetism quiz free?
Yes - completely free, with no sign-up required. Type a topic, press start, and the AI generates an adaptive Magnetism quiz with an explanation for every answer.
Can teachers host this jee magnetism quiz live for a class?
Yes - create a free teacher account, host a live room on "Magnetism", and students join with a 6-character code at quff.in/join. No student accounts needed.
From the blog
Magnetism guides & reading
JEE Magnetism: 30 Practice Questions with Solutions
Thirty solved Magnetism questions. The difficulty here is direction, not algebra - so the right-hand rule gets drilled throughout.
Exam PrepJEE Electrostatics: 30 Practice Questions with Solutions
Thirty solved Electrostatics questions, built around the distinction that decides most of them: field is a vector, potential is a scalar.
Exam PrepJEE Current Electricity: 30 Practice Questions Solved
Thirty solved Current Electricity questions, and the redrawing skill that turns most JEE circuit problems into two lines of arithmetic.
More exam prep quizzes
Ready, player?
Six adaptive Magnetism questions. About two minutes. Climb the podium.