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NEET UG PHYSICS MCQ: UNITS & MEASUREMENTS

1 Hard

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Application +4 | -1

The speed (v) of ripples on the surface of water depends on surface tension (

\sigma

), density (

\rho

) and wavelength (

\lambda

). The square of speed (v) is proportional to

View answer and explanation

Correct option: A

\frac{\sigma }{{\rho \lambda }}

Option A (

\frac{\sigma }{{\rho \lambda }}

) is correct because it correctly relates the speed of ripples to surface tension, density, and wavelength 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}} }}