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Physics - Error Question with Solution | TestHub

PhysicsErrorMiscellaneousMedium2 minQB

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In Searle's experiment, a $50 kg$ load is added to a $3 m$ wire of area $1 0^{- 5} m^{2}$ . A micrometer of pitch $1 mm$ makes a quarter-turn to restore the spirit level. Young's modulus is:

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Answer:

Solution:

Extension $= \frac{1}{4} (1 mm) = 2.5 \times 1 0^{- 4} m$ .

$Y = \frac{M gL}{A Δ L}$ .

Using $g ≃ 10 m s^{- 2}$ , $Y = \frac{50 ( 10 ) ( 3 )}{1 0 ^{- 5} ( 2.5 \times 1 0 ^{- 4} )} = 6 \times 1 0^{11} N m^{- 2}$ .

Stream:JEESubject:PhysicsTopic:ErrorSubtopic:Miscellaneous

⏱ 2mℹ️ Source: QB

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