A) \[{{a}^{2}}\]
B) \[{{a}^{3}}\]
C) a
D) \[{{a}^{-1}}\]
Correct Answer: A
Solution :
Terminal velocity in a viscous medium is given by: \[{{V}_{T}}=\frac{2{{a}^{2}}(\rho -\sigma )g}{9\eta }\] \[\therefore \]\[{{V}_{T}}\propto {{a}^{2}}\]
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