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NEET UG PHYSICS MCQ: UNITS & MEASUREMENTS
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Statement-I: If a physical quantity has a unit, it must not be dimensionless.
Statement-II: No physical quantity exists which has dimension but no unit.
Statement-II: No physical quantity exists which has dimension but no unit.
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Correct option: C
Statement-I is false and statement-II is true
Statement-I is false and statement-II is true because dimensionless quantities can have units (e.g., radian), and there are no known physical quantities with dimensions but no unit.
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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