Latest IIT-JEE Aptitude Question SOLUTION: A physical quantity is measured and the result is expressed as nu where u is the unit used and n is the numerical value. If the result is expressed in various units then : (A) n �

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(#M40027346) IIT-JEE Logical Reasoning question Physics Keep an EYE

A physical quantity is measured and the result
is expressed as nu where u is the unit used
and n is the numerical value. If the result is
expressed in various units then :
(A) n ∝ size of u (B) n ∝ u2
(C) n ∝ u (D) n ∝ u
1

Asked In IIT-JEE MAN (10 years ago)

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Shwetangi Jha  (6 years ago)

I would start by stating that for any measurement, the unit value is arbitrary. For instance, you can measure distance in meters, inches, etc., so start with the expression:

nu = mv

where mv is the same measurement in different units. If you consider mv a constant, you can manipulate the above equation to get:

n = (mv)/u

which shows that n is proportional to 1/u.

Basically whenever you take a measurement, that larger the units you use, the smaller the number is going to be. 1 meter is 100 centimeters is 1000 millimeters.

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