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JEE PHYSICS MCQ: UNITS & MEASUREMENTS
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Statement-I: In the measurement of using simple pendulum generally we take central position (mean position) of the oscillation as reference position for measuring time of oscillation.
Statement-II: This reduces the human error in measurement of time.
Statement-II: This reduces the human error in measurement of time.
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Correct option: A
Statement-I is true and statement-II is true
Option A is correct because both statements are true. Taking the mean position as a reference reduces human error in measuring the time period of oscillation.
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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
