Day 94: JEE Mains Physics

1. A.
   $1 - \frac{1}{n^{2}}$
2. B.
   $1 - n^{2}$
3. C.
   $\sqrt{1 - \frac{1}{n^{2}}}$
4. D.
   $\sqrt{1 - n^{2}}$

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1. A.
   $\tan^{- 1}(2)$
2. B.
   $\tan^{- 1}(4)$
3. C.
   $\tan^{- 1}\left( \frac{1}{4} \right)$
4. D.
   $\tan^{- 1}\left( \frac{1}{2} \right)$

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1. A.
   $1.094 \times 10^{- 6}\text{ }m$
2. B.
   $2.973 \times 10^{- 6}\text{ }m$
3. C.
   $3.646 \times 10^{- 6}\text{ }m$
4. D.
   $1.876 \times 10^{- 6}\text{ }m$

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1. A.
   $\sqrt{t_{1}t_{2}}$
2. B.
   $\sqrt{t_{1} - t_{2}}$
3. C.
   $\sqrt{\frac{t_{1}}{t_{2}}}$
4. D.
   $\sqrt{t_{1} + t_{2}}$

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