Day 419: JEE Mains Physics

1. A.
   $8.5 \times 10^{- 4}\text{ }J$
2. B.
   $8.2 \times 10^{- 4}\text{ }J$
3. C.
   $7.5 \times 10^{- 4}\text{ }J$
4. D.
   $5.3 \times 10^{- 4}\text{ }J$

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1. A.
   $\overrightarrow{B} = E_{0}Ccos(\omega t - kz)\widehat{j}$
2. B.
   $\overrightarrow{B} = \frac{E_{0}}{C}\cos(\omega t - kz)\widehat{j}$
3. C.
   $\overrightarrow{B} = E_{0}Cos(\omega t + kz)\widehat{j}$
4. D.
   $\overrightarrow{B} = \frac{E_{0}}{C}\cos(\omega t + kz)\widehat{j}$

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1. A.
   $2\text{ }mm$
2. B.
   $2\text{ }cm$
3. C.
   $0.02\text{ }mm$
4. D.
   $0.2\text{ }mm$

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1. A.
   $1:8$
2. B.
   $8:1$
3. C.
   $1:4$
4. D.
   $4:1$

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