Day 309: JEE Mains Physics

1. A.
   $\frac{dn_{1}n_{2}}{\left( n_{1} + n_{2} \right)}$
2. B.
   $\frac{d\left( n_{1} + n_{2} \right)}{2n_{1}n_{2}}$
3. C.
   $\frac{dn_{1}n_{2}}{2\left( n_{1} + n_{2} \right)}$
4. D.
   $\frac{2d\left( n_{1} + n_{2} \right)}{n_{1}n_{2}}$

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1. A.
   $4\Omega$ and $6\Omega$ are in parallel with $2\Omega$ and $8\Omega$ in series
2. B.
   $6\Omega$ and $8\Omega$ are in parallel with $2\Omega$ and $4\Omega$ in series
3. C.
   $2\Omega$ and $6\Omega$ are in parallel with $4\Omega$ and $8\Omega$ in series
4. D.
   $2\Omega$ and $4\Omega$ are in parallel with $6\Omega$ and $8\Omega$ in series

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1. A.
   $3 \times 10^{- 17}\text{ }kg\text{ }m/s$
2. B.
   $2 \times 10^{- 17}\text{ }kg\text{ }m/s$
3. C.
   $1 \times 10^{- 17}\text{ }kg\text{ }m/s$
4. D.
   $0.5 \times 10^{- 17}\text{ }kg\text{ }m/s$

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1. A.
   $2{mgR}_{E}$
2. B.
   ${mgR}_{E}$
3. C.
   $\frac{1}{2}{mgR}_{E}$
4. D.
   $4{mgR}_{E}$

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