JEE PHYSICS MCQ: UNITS & MEASUREMENTS

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Analyzing +4 | -1

x

is the depression produced in the middle of a beam of length

l

breadth b and thickness d and a load of mass m is attached at the centre of the beam. If y is the young Modulus of the material. Which of the following is dimensionally correct

View answer and explanation

Correct option: B

x = \frac{{mg{l^3}}}{{4\,b{d^3}y}}

Option D (

x = \frac{{mg{l^3}}}{{4\,b{d^3}y}}

) is correct because it is the only option where the dimensions of both sides of the equation match, resulting in length.

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