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NEET UG PHYSICS MCQ: UNITS & MEASUREMENTS
1
Medium
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Analyzing
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A rectangular beam which is supported at its two ends and leaded in the middle with weight w sags by an amount δ such that , where and Y represent length, depth and elasticity respectively. Guess the unknown factor using dimensional considerations
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Correct option: A
Breadth
Option A (Breadth) is correct because including breadth in the denominator with depth and elasticity gives the correct dimensions for the sag.
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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