Day 282: MHT-CET Physics

1. A.
   $\pi : 4$
2. B.
   $4 : \pi$
3. C.
   $\pi : 1$
4. D.
   $2 : \pi$

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1. A.
   a lift going upward with a certain acceleration
2. B.
   accelerating train
3. C.
   a satellite rotating close to earth
4. D.
   a lift going down with acceleration less than '$g$'

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1. A.
   trivalent impurity and electrons are majority carriers.
2. B.
   pentavalent impurity and electrons are minority carriers.
3. C.
   pentavalent impurity and holes are minority carriers.
4. D.
   trivalent impurity and holes are majority carriers.

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1. A.
   $1:3$
2. B.
   $3:1$
3. C.
   $3:4$
4. D.
   $12:1$

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1. A.
   $\frac{Ml^2}{4}$
2. B.
   $\frac{2Ml^2}{3}$
3. C.
   $\frac{4Ml^2}{3}$
4. D.
   $\frac{Ml^2}{3}$

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