NEET · Physics · STD 12 - 8. Electromagnetic waves
An em wave is propagating in a medium with a velocity \(\vec v =v\hat i.\) The instantaneous oscillating electric field of this em wave is along \(+y\) axis. Then the direction of oscillating magnetic field of the em wave will be along
- A \(- z\) direction
- B \(+ z \) direction
- C \(- x\) direction
- D \(- y\) direction
Answer & Solution
Correct Answer
(B) \(+ z \) direction
Step-by-step Solution
Detailed explanation
Velocity of em wave in a medium is given by \(\vec{v}=\vec{E} \times \vec{B}\) \(\therefore \quad v \hat{i}=(E \hat{j}) \times(\vec{B})\)
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