AktiraAktira JEE
Subscribe
PhysicsJEE Main 28 Jan 2026, Shift 2·Q2·MCQ·Easy–moderate

Electromagnetic Waves · EM waves

A plane electromagnetic wave is moving in free space with velocity c=3×108c = 3\times10^{8} m/s and its electric field is given as E⃗=54sin⁡(kz−ωt) j^ V/m\vec E = 54\sin(kz - \omega t)\,\hat j\ \mathrm{V/m}, where j^\hat j is the unit vector along y-axis. The magnetic field vector B⃗\vec B of the wave is:
  1. (1)−1.8×10−7sin⁡(kz−ωt) i^ T-1.8\times10^{-7}\sin(kz - \omega t)\,\hat i\ \mathrm{T}
  2. (2)1.4×10−7sin⁡(kz−ωt) k^ T1.4\times10^{-7}\sin(kz - \omega t)\,\hat k\ \mathrm{T}
  3. (3)1.4×10−7sin⁡(kz−ωt) i^ T1.4\times10^{-7}\sin(kz - \omega t)\,\hat i\ \mathrm{T}
  4. (4)+1.8×10−7sin⁡(kz−ωt) i^ T+1.8\times10^{-7}\sin(kz - \omega t)\,\hat i\ \mathrm{T}

Video solution coming soon

We're animating every PYQ step by step. Subscribe to get them first.

Subscribe

See the full 28 Jan 2026, Shift 2 paper

More on EM waves