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Question: Answered & Verified by Expert
In Searle's method to find Young's modulus of a wire, when a force of $1 \cdot 5 \mathrm{~kg}$ -wt is applied at its free end, the length of wire is ' $a$ '. When force of $2 \cdot 5$ kg-wt is applied, the length of wire is 'b'. What would be its original length?
PhysicsExperimental PhysicsMHT CETMHT CET 2020 (12 Oct Shift 2)
Options:
  • A $\mathrm{b}-\mathrm{a}$
  • B $\frac{\mathrm{b}-\mathrm{a}}{4}$
  • C $2 \cdot 5 \mathrm{a}-1 \cdot 5 \mathrm{~b}$
  • D $2 \cdot 5 \mathrm{~b}-1 \cdot 5 \mathrm{a}$
Solution:
2467 Upvotes Verified Answer
The correct answer is: $2 \cdot 5 \mathrm{a}-1 \cdot 5 \mathrm{~b}$
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