TS EAMCET · Physics · Atomic Physics

For an $E M$ Wave, the electric and magnetic fields are $300 V m^{- 1}$ and $7.9 A m^{- 1}$ respectively. The maximum rate of energy flow is,

A $2730 watt m^{- 2}$
B $2790 watt m^{- 2}$
C $2370 watt m^{- 2}$
D $2390 watt m^{- 2}$

Verified Solution

Answer & Solution

Correct Answer

(C) $2370 watt m^{- 2}$

Step-by-step Solution

Detailed explanation

Here, the amplitude of the electric field, E0=300 V m-1; the amplitude of the magnetic field, H0=7.9 A m-1. We know that the maximum rate of energy flows in terms of the amplitude of the electric field and magnetic field,…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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For an EM Wave, the electric and magnetic fields are 300 V m-1 and 7.9 A m-1 respectively. The maximum rate of energy flow is,

Step-by-step Solution

For an $E M$ Wave, the electric and magnetic fields are $300 V m^{- 1}$ and $7.9 A m^{- 1}$ respectively. The maximum rate of energy flow is,