Questions
A mild steel wire of length 2L and cross-sectional area A is stretched, well within elastic limit, horizontally between two pillars (figure ). A mass m is suspended from the mid-point of the wire. Strain in the wire is [NCERT Exemplar]
detailed solution
Correct option is A
Consider the diagram belowHence, change in length, ΔL=BO+OC−(BD+DC)=2BO−2BD (∵BO=OC,BD=DC)=2[BO−BD]=2x2+L21/2−L=2L1+x2L21/2−1≈2L1+12x2L2−1=x2L(∵x<Talk to our academic expert!
Similar Questions
Consider the following statements.
(A) Stress is the internal restoring force per unit area of a body.
(B) Rubber is more elastic than brass.
Select the correct option.
(a)(A) is false, But (B) is true.
(b) Both (A) and (B)are true.
(c) (A) is true, But (B) is false.
(d) Both (A)and(B)are false.
799 666 8865
support@infinitylearn.com
6th Floor, NCC Building, Durgamma Cheruvu Road, Vittal Rao Nagar, HITEC City, Hyderabad, Telangana 500081.
free study material
JEE Mock Tests
JEE study guide
JEE Revision Notes
JEE Important Questions
JEE Sample Papers
JEE Previous Year's Papers
NEET previous year’s papers
NEET important questions
NEET sample papers
NEET revision notes
NEET study guide
NEET mock tests
