Day 535: JEE Mains Physics

1. A.
   $R_{e} = \frac{\eta d}{\rho v}$
2. B.
   $R_{e} = \frac{\rho v}{\eta d}$
3. C.
   $R_{e} = \frac{\rho vd}{\eta}$
4. D.
   $R_{e} = \frac{\eta}{\rho vd}$

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1. A.
   Positive y-axis
2. B.
   Positive $x$-axis
3. C.
   Positive z-axis
4. D.
   In $x - y$ plane

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1. A.
   3
2. B.
   4
3. C.
   6
4. D.
   2

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1. A.
   $\frac{\mu_{0}I}{4\pi xy}\left\lbrack \sqrt{x^{2} + y^{2}} + (x + y) \right\rbrack$
2. B.
   $\frac{\mu_{0}I}{4\pi xy}\left\lbrack \sqrt{x^{2} + y^{2}} - (x + y) \right\rbrack$
3. C.
   $\frac{\mu_{0}Ixy}{4\pi}\left\lbrack \sqrt{x^{2} + y^{2}} - (x + y) \right\rbrack$
4. D.
   $\frac{\mu_{0}Ixy}{4\pi}\left\lbrack \sqrt{x^{2} + y^{2}} + (x + y) \right\rbrack$

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

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