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JEE PHYSICS MCQ: UNITS & MEASUREMENTS
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Medium
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Understanding
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Statement I: The mass of an object is in the measurement there are 3 significant figures.
Statement II: The same mass when expressed in grams as has five significant figures.
Statement II: The same mass when expressed in grams as has five significant figures.
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Correct option: C
Statement I is true; Statement II is false
Option C (Statement I is true; Statement II is false) is correct because changing the unit does not change the number of significant figures.
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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
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
