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NEET UG PHYSICS MCQ: UNITS & MEASUREMENTS
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The thrust developed by a rocket-motor is given by , where m is the mass of the gas ejected per unit time, is velocity of the gas, A is area of cross-section of the nozzle, are the pressures of the exhaust gas and surrounding atmosphere. The formula is dimensionally
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Correct option: A
Correct
Option A (Correct) is correct because both terms in the equation have the dimensions of force.
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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