Day 87: MH HSC Class 12 Physics

1. A.
   $[L^{-1}M^{1}T^{-2}]$
2. B.
   $[L^{2}M^{1}T^{-2}]$
3. C.
   $[L^{1}M^{1}T^{-1}]$
4. D.
   $[L^{0}M^{1}T^{-2}]$

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1. A.
   base-emitter junction is forward biased and base-collector junction is reverse biased.
2. B.
   both base-emitter and base-collector junctions are reverse biased.
3. C.
   both base-emitter and base-collector junctions are forward biased.
4. D.
   base-emitter junction is reverse biased and base-collector junction is forward biased.

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

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