If the direction of magnetic field B^→ at some instant is along + ve Z direction and the electro

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If the direction of magnetic field B^→ at some instant is...

If the direction of magnetic field $\mathrm{B}^{\rightarrow}$ at some instant is along + ve $Z$ direction and the electromagnetic wave is propagating along + ve $\mathrm{X}$ direction, then the direction of electric field $\mathrm{E}^{\rightarrow}$ at that instant is (A) along - ve Y direction (B) along + ve Y direction (C) along + ve $\mathrm{X}$ direction (B) along - ve $\mathrm{X}$ direction

If the direction of magnetic field $\mathrm{B}^{\rightarrow}$ at some instant is along + ve $Z$ direction and the electromagnetic wave is propagating along + ve $\mathrm{X}$ direction, then the direction of electric field $\mathrm{E}^{\rightarrow}$ at that instant is
(A) along - ve Y direction
(B) along + ve Y direction
(C) along + ve $\mathrm{X}$ direction
(B) along - ve $\mathrm{X}$ direction

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Key Concepts

Electromagnetic Wave Propagation

Electromagnetic waves consist of oscillating electric and magnetic fields that propagate through space. These fields are perpendicular not only to the direction of wave propagation but also to each other, forming an orthogonal set, which is a fundamental trait of electromagnetic wave behavior.

Right-Hand Rule

The right-hand rule is a mnemonic used to determine the orientation of the electric field, magnetic field, and propagation direction in an electromagnetic wave. By pointing the fingers of the right hand in the direction of the electric field and curling them towards the magnetic field, the thumb will indicate the direction of propagation, ensuring consistency in the spatial relation between these vectors.

Mutual Orthogonality of Fields

In an electromagnetic wave, the electric field, magnetic field, and direction of wave propagation are all mutually perpendicular. This orthogonality is crucial for the self-sustaining nature of electromagnetic waves where the oscillations of one field continuously induce the other, allowing the wave to travel through free space.

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