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Students and measure the length of a room using long measuring tape of least count meter-scale of and a foot-scale of respectively. If the specified length of the room is then which of the following students will report the lowest relative error in the measured length?
(a)Student
(b)Student
(c)Student
(d)Both, student and

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Important Questions on Physical World and Measurement
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A physical quantity is described by the relation . If the relative errors in the measurement of , , and respectively, are , , and . Then the relative error in will be:

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Two students and perform an experiment to verify Ohm's law for a conductor with resistance . They use a current source and a voltmeter with the least counts of and , respectively. The plots of the variation of voltage drop across with current for both are shown below.
The statement which is most likely to be correct?

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