Day 387: MHT-CET Physics

1. A.
   decreases surface tension of water.
2. B.
   increases surface tension of water.
3. C.
   makes surface tension of water zero.
4. D.
   increases its density.

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1. A.
   $0.85$
2. B.
   $\sqrt{0.15}$
3. C.
   $1$
4. D.
   $\sqrt{0.77}$

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1. A.
   object must be large
2. B.
   focal length of objective is large
3. C.
   focal length of eyepiece is large
4. D.
   focal length of objective and eyepiece must be large

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1. A.
   $2\pi\sqrt{\frac{L}{g}}$
2. B.
   $2\pi\sqrt{\frac{L^{2}}{g}}$
3. C.
   $2\pi\sqrt{\frac{\left(L^{2} - d^{2}\right)^{1/2}}{g}}$
4. D.
   $2\pi\sqrt{\frac{\left(L^{2} + d^{2}\right)^{1/2}}{g}}$

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1. A.
   $\dfrac{1}{4}$
2. B.
   $\dfrac{1}{2}$
3. C.
   $\dfrac{1}{8}$
4. D.
   $\dfrac{1}{6}$

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