Day 77: MHT-CET Physics

1. A.
   the conduction band.
2. B.
   the valence band.
3. C.
   the band gap and are close to conduction band.
4. D.
   the band gap and are close to valence band.

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1. A.
   $460$
2. B.
   $540$
3. C.
   $780$
4. D.
   $7800$

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1. A.
   $\dfrac{n^1 + S}{S^1}$
2. B.
   $\dfrac{S(n^1 - 1) - S^1}{S}$
3. C.
   $\dfrac{(n^1 + 1)S^1}{S}$
4. D.
   $\dfrac{S + S^1(n^1 - 1)}{S}$

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1. A.
   $4.5$ mJ
2. B.
   $3\ \mu\mathrm{J}$
3. C.
   $45\ \mu\mathrm{J}$
4. D.
   $4500$ mJ

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1. A.
   $3R$
2. B.
   $\sqrt{3}\,R$
3. C.
   $\dfrac{R}{2\sqrt{3}}$
4. D.
   $\dfrac{2R}{\sqrt{3}}$

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