The dimensional formula of coefficient of viscosity is
A. [ML⁻¹T⁻¹]
B. [ML⁻²T]
C. [M⁰LT⁻¹]
D. [MLT⁻¹]
Answer: Option A
Solution (By JKSSB Mock Tests)
Viscosity η = Force/(Area × velocity gradient). Force [MLT⁻²], area [L²], velocity gradient [T⁻¹]. So η = [MLT⁻²]/([L²][T⁻¹]) = [ML⁻¹T⁻¹]. Often asked.
Explanation:
Convex mirror gives wider field of view, always forms virtual, erect, diminished image. Allows driver to see larger area. Concave can magnify but field narrow. Plane gives normal view but limited field.
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