Day 623: JEE Mains Physics

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

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1. A.
   1.66
2. B.
   1.75
3. C.
   2.25
4. D.
   2.33

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1. A.
   $\frac{\sigma_{1}\sigma_{2}}{\sigma_{1} + \sigma_{2}}$
2. B.
   $\frac{2\sigma_{1}\sigma_{2}}{\sigma_{1} + \sigma_{2}}$
3. C.
   $\frac{\sigma_{1} + \sigma_{2}}{2\sigma_{1}\sigma_{2}}$
4. D.
   $\frac{\sigma_{1} + \sigma_{2}}{\sigma_{1}\sigma_{2}}$

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1. A.
   $12\text{ }cm$
2. B.
   $10\text{ }cm$
3. C.
   $8\text{ }cm$
4. D.
   $5\text{ }cm$

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