Terminal velocity of a conductor or loop falling through a magnetic field

1. A.
   $\dfrac{mglB}{R}$
2. B.
   $\dfrac{B^2l^2}{mgR}$
3. C.
   $\dfrac{mgR}{Bl}$
4. D.
   $\dfrac{mgR}{B^2l^2}$

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1. A.
   $\frac{{mgR}^{2}}{\text{ }Bl}$
2. B.
   $\frac{B^{2}l^{2}R}{mg}$
3. C.
   $\frac{mgR}{B^{2}l^{2}}$
4. D.
   $\frac{mgl}{{\text{ }B}^{2}R^{2}}$

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1. A.
   $\dfrac{B^2l^2R^2}{mg}$
2. B.
   $\dfrac{mgR}{B^2l^2}$
3. C.
   $\dfrac{mgl}{B^2R^2}$
4. D.
   $\dfrac{mgR^2}{Bl}$

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