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NEET UG PHYSICS MCQ: UNITS & MEASUREMENTS

1 Hard

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Analyzing +4 | -1

The liquid drop of density

\rho ,

radius

r

and surface tension

\sigma

oscillates with time period T. Which of the following expression for

{T^2}

is correct

View answer and explanation

Correct option: A

\frac{{\rho {r^3}}}{\sigma }

Option A (

\frac{{\rho {r^3}}}{\sigma }

) is correct because it gives the correct relationship between time period, density, radius, and surface tension based on dimensional analysis.

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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}} }}