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JEE PHYSICS MCQ: UNITS & MEASUREMENTS
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Percentage error in the measurement of mass and speed are 3% and 4% respectively. The error in the estimate of kinetic energy obtained by measuring mass and speed will be
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Correct option: D
0.11
Option D (11%) is correct because the percentage error in kinetic energy is the sum of the percentage error in mass and twice the percentage error in speed.
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Reason: Acceleration has the dimensions of The method of dimensional analysis can be used to derive which of the following relations? Statement-I: Dimensions of constant of proportionality of constants can be derived from dimensional method
Statement-II: Numerical value of constant of proportionality can be found from experiments only The dimensions of torque are The physical quantity having the dimensions is A quantity X is given by , where is the permittivity of free space, L is a length, is a potential difference and is a time interval. The dimensional formula for X is the same as that of
