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NEET UG PHYSICS MCQ: UNITS & MEASUREMENTS
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The mass of the liquid flowing per second per unit area of cross-section of the tube is proportional to (pressure difference across the ends) and (average velocity of the liquid. Which one of the following relation is correct?
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Correct option: B
Option B () is correct because the mass flow rate per unit area is proportional to (pressure difference) and (average velocity), and based on dimensional analysis, m and n must have opposite signs and equal magnitudes.
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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 is that of
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 is that of