Day 109: MHT-CET Physics

1. A.
   $R = \dfrac{R_1 + R_2}{2}$
2. B.
   $R^3 = R_1^3 + R_2^3$
3. C.
   $R^2 = R_1^2 + R_2^2$
4. D.
   $R = R_1 + R_2$

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1. A.
   $\dfrac{f}{2}$ and $2P$
2. B.
   $\sqrt{2}f$ and $\dfrac{P}{\sqrt{2}}$
3. C.
   $2f$ and $\dfrac{P}{2}$
4. D.
   $f$ and $P$

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1. A.
   $\dfrac{\varepsilon_0^2h^4}{8\pi^2me^4}$
2. B.
   $\dfrac{16\varepsilon_0^2h^4}{\pi^2me^4}$
3. C.
   $\dfrac{2\varepsilon_0^2h^4}{\pi^2me^4}$
4. D.
   $\dfrac{4\varepsilon_0^2h^2m}{\pi^2e^4}$

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1. A.
   $4 : 1$
2. B.
   $3 : 1$
3. C.
   $6 : 1$
4. D.
   $8 : 1$

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1. A.
   $\cos^{-1}\left(\dfrac{4}{\sqrt{11}}\right)$
2. B.
   $\cos^{-1}\left(\dfrac{3}{\sqrt{17}}\right)$
3. C.
   $\cos^{-1}\left(\dfrac{2}{\sqrt{29}}\right)$
4. D.
   $\cos^{-1}\left(\dfrac{5}{\sqrt{23}}\right)$

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