CUET · PHYSICS · PYQ PAPER 2023
A point source heating device of 1000 W with 10% efficiency is 7m from the observational location. Find the peak value of electric field produced by the radiation at that location.
- A 3.5 V/m
- B 9.0 V/m
- C 11.05 V/m
- D 12.0 V/m
Answer & Solution
Correct Answer
(C) 11.05 V/m
Step-by-step Solution
Detailed explanation
\(P_{eff} = P \times \eta = 1000\,W \times 0.10 = 100\,W\) \(I = \frac{P_{eff}}{4\pi r^2} = \frac{100\,W}{4\pi (7\,m)^2} = \frac{100}{196\pi}\,W/m^2 \approx 0.1624\,W/m^2\)…
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