Verified Solution • 2025–26 Session moderate

QJEEM17Phabd5: JEE Main 2017 Physics - Class 12 JEEM17Phabd5 Solution: Magnetic field in a plane electromagnetic wave is given by B →…

Magnetic field in a plane electromagnetic wave is given by

B→ = B0 sin (k x + ωt) j^T

Expression for corresponding electric field will be :
Where c is speed of light.

Multiple Choice Options

  • A E→ = B0 c sin (k x + ωt) k^ V/m
  • B E→ = B0c sin (k x + ωt) k^ V/m
  • C E→ = − B0 c sin (kx +ωt) k^ V/m
  • D E→ = B0 c sin (kx −ωt) k^ V/m

Step-by-Step Verified Solution

The relation between electric and magnetic field is ,

C = E→B→

⇒ E→ = C B→

Electric field component is perpendicular to the direction of magnetic field. Given magnetic field is along y − axis,

So, electric field along z − axis will be

E→ = B0 C sin (kx + ωt) k^ v/m

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