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JEE Mains · Physics · STD 12 - 8. Electromagnetic waves

यदि एक समतल विधुत-चुम्बकीय तरंग का चुम्बकीय क्षेत्र \(\overrightarrow{ B }=3 \times 10^{-8} \sin \left(1.6 \times 10^{3} x +48 \times 10^{10} t \right) \hat{ j } T\) हो, तो इसका विधुत क्षेत्र होगा।

  1. A \(\overrightarrow{\mathrm{E}}=\left(9 \sin \left(1.6 \times 10^{3} \mathrm{x}+48 \times 10^{10} \mathrm{t}\right) \hat{\mathrm{k}} \;\mathrm{V} / \mathrm{m}\right)\)
  2. B \(\left.\overrightarrow{\mathrm{E}}=\left(3 \times 10^{-8} \sin \left(1.6 \times 10^{3} \mathrm{x}+48 \times 10^{10} \mathrm{t}\right)\right) \hat{\mathrm{i}}\; \mathrm{V} / \mathrm{m}\right)\)
  3. C \(\overrightarrow{\mathrm{E}}=\left(60 \sin \left(1.6 \times 10^{3} \mathrm{x}+48 \times 10^{10} \mathrm{t}\right) \hat{\mathrm{k}}\; \mathrm{V} / \mathrm{m}\right)\)
  4. D \(\overrightarrow{\mathrm{E}}=\left(3 \times 10^{-8} \sin \left(1.6 \times 10^{3} \mathrm{x}+48 \times 10^{10} \mathrm{t}\right) \hat{\mathrm{j}} \;\mathrm{V} / \mathrm{m}\right)\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(\overrightarrow{\mathrm{E}}=\left(9 \sin \left(1.6 \times 10^{3} \mathrm{x}+48 \times 10^{10} \mathrm{t}\right) \hat{\mathrm{k}} \;\mathrm{V} / \mathrm{m}\right)\)

Step-by-step Solution

Detailed explanation

\(\overrightarrow{\mathrm{E}} \times \overrightarrow{\mathrm{B}}=\overrightarrow{\mathrm{C}}=-\hat{\mathrm{i}}\) where \(\overrightarrow{\mathrm{B}}\) is along \(\hat{\mathrm{j}}\) \(\frac{E}{B}=C\) \(\mathrm{E}=3 \times 10^{-8} \times 3 \times 10^{8}=9 \mathrm{V} / \mathrm{m}\)
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