Day 76: JEE Mains Physics

1. A.
   A, B and C only
2. B.
   B, C and D only
3. C.
   A and B only
4. D.
   A, B and D only

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1. A.
   $\frac{\Delta u}{u} + \frac{\Delta v}{v}$
2. B.
   $f^{2}\left\lbrack \frac{\Delta u}{u^{2}} + \frac{\Delta v}{v^{2}} \right\rbrack$
3. C.
   $2f\left\lbrack \frac{\Delta u}{u} + \frac{\Delta v}{v} \right\rbrack$
4. D.
   $f\left\lbrack \frac{\Delta u}{u} + \frac{\Delta v}{v} \right\rbrack$

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1. A.
   $50\%,\sqrt{\frac{gh}{2}}$
2. B.
   $50\%,\sqrt{gh}$
3. C.
   $40\%,\sqrt{2gh}$
4. D.
   $50\%,\sqrt{2gh}$

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