Day 424: JEE Mains Physics

1. A.
   $2.8 \times 10^{- 4}\text{ }J$
2. B.
   $1.5 \times 10^{- 3}\text{ }J$
3. C.
   $1.9 \times 10^{- 4}\text{ }J$
4. D.
   $9.4 \times 10^{- 5}\text{ }J$

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1. A.
   $+ 0.8\sin(kz - \omega t){\widehat{a}}_{y} + 0.8\sin(kz - \omega t){\widehat{a}}_{x}$
2. B.
   $+ 1.0 \times 10^{- 6}\sin(kz - \omega t){\widehat{a}}_{y} + 1.5 \times 10^{- 6}(kz - \omega t){\widehat{a}}_{x}$
3. C.
   $- 0.8\sin(kz - \omega t){\widehat{a}}_{y} - 1.2\sin(kz - \omega t){\widehat{a}}_{x}$
4. D.
   $- 1.0 \times 10^{- 6}\sin(kz - \omega t){\widehat{a}}_{y} - 1.5 \times 10^{- 6}\sin(kz - \omega t){\widehat{a}}_{x}$

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1. A.
   $200\text{ }m/s$
2. B.
   $200\sqrt{2}\text{ }m/s$
3. C.
   $400\text{ }m/s$
4. D.
   $400\sqrt{2}\text{ }m/s$

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