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Magnetism and Matter — NEET & JEE Physics MCQs

30 questions written by hand against the NCERT chapter. Every wrong option is explained, not just the right one.

30questions
10/14/6easy / medium / hard
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Sample questions from this chapter

What happens when a bar magnet is cut into two pieces?
  1. Each piece becomes a smaller magnet with north and south poles ✓
  2. One piece is only north and the other only south
  3. Both pieces lose all magnetism
  4. Isolated poles appear briefly
Answer: A. Cutting divides the dipole distribution, producing two weaker complete magnets rather than separate poles.
Why not B: Magnetic monopoles are not produced by cutting a dipole.
Why not C: Each fragment retains aligned magnetic dipoles and remains magnetic.
Why not D: No isolated magnetic pole has been observed even transiently in this process.
What magnetic moment is associated with an N-turn planar coil carrying current I and enclosing area A?
  1. NIA ✓
  2. IA/N
  3. NI/A
  4. NIA²
Answer: A. A current loop is a magnetic dipole of moment IA; N closely wound turns give m=NIA.
Why not B: Identical turns add their moments instead of dividing the one-turn value.
Why not C: A larger loop produces a larger moment, so area cannot be in the denominator.
Why not D: Magnetic moment contains the first power of enclosed area.
A short bar magnet at 30.0° to a uniform 0.250 T field experiences torque 4.50×10⁻² N m. What is its magnetic moment?
  1. 0.0900 A m²
  2. 0.180 A m²
  3. 0.360 A m² ✓
  4. 0.720 A m²
Answer: C. m=τ/(B sinθ)=4.50×10⁻²/(0.250×0.500)=0.360 A m².
Why not A: This multiplies the torque by B and sin30° rather than dividing by both.
Why not B: This divides by B but omits the sin30° orientation factor.
Why not D: This treats sin30° as one-fourth rather than one-half.

These are 3 of the 30 questions in the test. Take the full chapter test →

Read the chapter first

Every NCERT question in this chapter is solved, free: NCERT solutions — Magnetism and Matter →

Other NEET Physics chapters

Units and MeasurementMotion in a Straight LineMotion in a PlaneLaws of MotionWork Energy and PowerSystems of Particles and Rotational Motion

All 28 chapters →

Questions

How many NEET and JEE questions are there on Magnetism and Matter?

This chapter test has 30 questions — 10 easy, 14 medium and 6 hard — all written against the NCERT Class 12 chapter.

Is this NEET and JEE Physics chapter test free?

Yes. Every chapter test is free with no login, and you get your all-India rank on every one. Nothing on the site is on sale right now.

Do the questions explain the wrong options?

Yes — every distractor carries its own explanation naming the specific misconception that makes a student pick it. That is the part most question banks skip, and it is the part that changes your next attempt.