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Electromagnetic Induction: NEET previous year questions

Every Electromagnetic Induction question from the official NEET papers on this site, with the answer and a worked solution.

The questions come from NEET 2026 and Re-NEET 2026. Each shows its answer and solution when you open it, so you can attempt it first. For what the chapter covers and how NEET tests it, see the Electromagnetic Induction guide.

NEET 2026 · the full paper

  1. NEET 2026 · Q30

    A rectangular wire loop of sides 8 cm and 3 cm with a small cut, is moving out of a region of uniform magnetic field of magnitude 0.3 T directed normal to the plane of the loop. The emf developed across the cut, if the velocity of the loop is 2 cm s−1^{-1}, in a direction normal to the shorter side of the loop, will be:

    1. (1)

      4.8×10−44.8 \times 10^{-4} volt

    2. (2)

      1.2×10−41.2 \times 10^{-4} volt

    3. (3)

      1.3×10−41.3 \times 10^{-4} volt

    4. (4)

      1.8×10−41.8 \times 10^{-4} volt

    Answer and solution

    Answer: (4)

    The motional electromotive force (emf) is E=BvlE = Bvl, where ll is the side perpendicular to the velocity. Since the loop moves normal to the shorter side, the effective length is the shorter side (3 cm): E=0.3×(2×10−2)×(3×10−2)=1.8×10−4E = 0.3 \times (2\times10^{-2}) \times (3\times10^{-2}) = 1.8\times10^{-4} V. Option (1) wrongly uses the 8 cm side.

Re-NEET 2026 · the full paper

  1. Re-NEET 2026 · Q3

    Two identical inductors are connected in two different configurations PP and QQ, where a time varying current I(t)I(t) is flowing, as shown in the figure. The induced emf between points aa and bb for configuration PP is EPE_P and that for configuration QQ is EQE_Q. The ratio EP/EQE_P/E_Q is: [Neglect the effect of mutual inductance.]

    figure
    1. (1)

      14\frac{1}{4}

    2. (2)

      12\frac{1}{2}

    3. (3)

      1

    4. (4)

      2

    Answer and solution

    Answer: (4)

    In configuration PP the two inductors are in series and the segment between aa and bb spans just ONE of them, carrying the full current, so EP=LdIdtE_P = L\frac{dI}{dt}. In configuration QQ the points aa and bb straddle the parallel pair, whose equivalent inductance is L2\frac{L}{2}, so EQ=L2dIdtE_Q = \frac{L}{2}\frac{dI}{dt}. The ratio is therefore 2. NCERT Class 12, Electromagnetic Induction (self-inductance).

    Why the other options are wrong:

    - (1) takes EPE_P across the series pair as 2L2L and inverts the ratio
    - (2) inverts the correct answer by swapping which configuration sits in the numerator
    - (3) assumes identical inductors must produce identical electromotive forces (emfs) regardless of how aa and bb are placed

  2. Re-NEET 2026 · Q5

    Consider a long solenoid of length ll and radius rr. If nn is the number of turns per unit length and μ0\mu_0 is the permeability of free space, the inductance of the solenoid is :

    1. (1)

      μ0πn2r2l\mu_0\pi n^2 r^2 l

    2. (2)

      μ0n2r2l\mu_0 n^2 r^2 l

    3. (3)

      (μ0/2π)n2r2l(\mu_0/2\pi) n^2 r^2 l

    4. (4)

      2μ0πn2r2l2\mu_0\pi n^2 r^2 l

    Answer and solution

    Answer: (1)

    For a long solenoid L=μ0n2AlL = \mu_0 n^2 A l, where nn is turns per unit length and AA the cross-sectional area. Substituting A=πr2A = \pi r^2 gives L=μ0πn2r2lL = \mu_0\pi n^2 r^2 l. NCERT Class 12, Electromagnetic Induction (self-inductance).

  3. Re-NEET 2026 · Q32

    A conducting loop of finite resistance lies on the x−yx - y plane. There is a constant magnetic field in the zz direction. The area of the loop varies with time tt, as A=A0(1+sin⁡t)A = A_0(1 + \sin t) in appropriate units. The figure that correctly indicates the qualitative behaviour of the power PP dissipated in the loop as a function of time is:

    1. (1)
      opt A
    2. (2)
      opt B
    3. (3)
      opt C
    4. (4)
      opt D
    Answer and solution

    Answer: (2)

    Faraday's law gives ε=−dΦdt=−BA0cos⁡t\varepsilon = -\frac{d\Phi}{dt} = -BA_0\cos t, so the dissipated power is P=ε2R=B2A02Rcos⁡2tP = \frac{\varepsilon^2}{R} = \frac{B^2A_0^2}{R}\cos^2 t. Because cos⁡2t\cos^2 t is MAXIMUM at t=0t = 0 and touches zero at t=π/2t = \pi/2, the correct graph starts at a peak and dips to zero, unlike a sin⁡2t\sin^2 t curve which would start at zero. PP is never negative because the electromotive force (emf) is squared. NCERT Class 12, Electromagnetic Induction (Faraday's law).

    Why the other options are wrong:

    - (1) differentiates sin⁡t\sin t to sin⁡t\sin t rather than cos⁡t\cos t, producing a sin⁡2t\sin^2 t curve that starts at zero
    - (3) assumes the constant field means a constant emf, forgetting that it is the CHANGING area that drives induction
    - (4) confuses the growing area with growing power, ignoring that the flux change is periodic and bounded

Practise Electromagnetic Induction in the app: it brings back the questions you get wrong, so the chapter improves, not just your memory of these. Or try the free CBT mock. All chapters: NEET chapter-wise PYQs.

Questions

Are these the official NEET questions on Electromagnetic Induction?

Yes. They are the questions NTA set in each paper, in its wording. The solutions are written by BrainIt.

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