If E is an electric field and \(\vec{B}\) is the magnetic induction, then the energy flow per unit area per unit time in an electromagnetic field is given by
A. \(\frac {1}{µ_0}\) \(\vec{E}\) × \(\vec{B}\)
B. \(\vec{E}\).\(\vec{B}\)
C. E² + B²
D. \(\frac {E}{B}\)
Answer:A
If E is an electric field and \(\vec{B}\) is the magnetic induction, then the energy flow per unit area per unit time in an electromagnetic field is given by
A. \(\frac {1}{µ_0}\) \(\vec{E}\) × \(\vec{B}\) B. \(\vec{E}\).\(\vec{B}\) C. E² + B² D. \(\frac {E}{B}\)