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NEET UG PHYSICS MCQ: UNITS & MEASUREMENTS

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Application +4 | -1

The force F on the sphere of radius ‘a’ moving in a medium with velocity '

v

' is given by

F = 6\pi \eta a\upsilon

. The dimensions of η are

View answer and explanation

Correct option: A

M{L^{ - 1}}{T^{ - 1}}

Option A (

M{L^{ - 1}}{T^{ - 1}}

) is correct because it represents the dimensions of viscosity (η) derived from the given formula using dimensional analysis.

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Statement-I: Random errors can be positive or negative.
Statement-II: Cause of random errors are uncertain. An object is moving through the liquid. The viscous damping force acting on it is proportional to the velocity. Then dimension of constant of proportionality is The error due to parallax is a: 2.34 is obtained by rounding of the number The dimensional formula of self-inductance is The dimension of

\frac{1}{{\sqrt {{\varepsilon _0}{\mu _0}} }}