SATHEE: Optics Question 299

Optics Question 299

Question: In an electromagnetic wave, the electric and magnetising fields are $100 V m^{- 1}$ and $0.265 A m^{- 1}$ . The maximum energy flow is

[Pb. PMT 1997, 98]

Options:

A) $26.5 W / m^{2}$

B) $36.5 W / m^{2}$

C) $46.7 W / m^{2}$

D) $765 W / m^{2}$

Show Answer

Answer:

Correct Answer: A

Solution:

Here $E_{0} = 100 V / m,$

$B_{0} = 0.265 A / m .$

Maximum rate of energy flow S = $E_{0} \times B_{0}$ = $100 \times .265 = 26.5 \frac{W}{m^{2}}$

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Optics Question 299

Question: In an electromagnetic wave, the electric and magnetising fields are 100Vm−1 and 0.265Am−1 . The maximum energy flow is

Options:

Answer:

Solution:

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Question: In an electromagnetic wave, the electric and magnetising fields are $100 V m^{- 1}$ and $0.265 A m^{- 1}$ . The maximum energy flow is