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A horizontal plate (10cmxx10cm) moves on...

A horizontal plate `(10cmxx10cm)` moves on a layer of oil of thickness 4 mm with constant speed of `10(cm)/(s)`. The coefficient of viscosity of oil is 4 poise. The tangential force applied on the plate to maintain the constant speed of the plate is

A

`10^(3) `dyne

B

`10^(4)` dyne

C

`10^(5)` dyne

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
Since plate moves with constant velocity
`:.` viscous force `=` Applied force
`etaA(Deltav)/(Deltax)=F`.
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