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NEET 2011
Exam
NEET
Year
2011
Subject
Physics
Chapter
Electromagnetic Waves

NEET 2011 · Physics · Electromagnetic Waves

The electric and the magnetic field, associated with an...

The electric and the magnetic field, associated with an electromagnetic wave, propagating along the +z+z-axis, can be represented by

Options

  1. A[E=E0k^,B=B0i^]\left[\mathbf{E}=E_0 \hat{\mathbf{k}}, \mathbf{B}=B_0 \hat{\mathbf{i}}\right]
  2. B[E=E0j^,B=B0j^]\left[\mathbf{E}=E_0 \hat{\mathbf{j}}, \mathbf{B}=B_0 \hat{\mathbf{j}}\right]
  3. C[E=E0j^,B=B0k^]\left[\mathbf{E}=E_0 \hat{\mathbf{j}}, \mathbf{B}=B_0 \hat{\mathbf{k}}\right]
  4. D[E=E0i^,B=B0j^]\left[\mathbf{E}=E_0 \hat{\mathbf{i}}, \mathbf{B}=B_0 \hat{\mathbf{j}}\right]

Correct answer

D. [E=E0i^,B=B0j^]\left[\mathbf{E}=E_0 \hat{\mathbf{i}}, \mathbf{B}=B_0 \hat{\mathbf{j}}\right]

Step-by-step solution

μ⃗=E→×B→\vec{\mu}=\overrightarrow{\mathbf{E}} \times \overrightarrow{\mathbf{B}} =E_0 \hat{i\mathbf{i}}+B_0 \hat{j\mathbf{j}}=E_0 B_0 \hat{k\mathbf{k}} E→×B→\overrightarrow{\mathbf{E}} \times \overrightarrow{\mathbf{B}} points in the direction of wave propagation.
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