JAMB Physics 2011 Objective — Question 13

Question 13 of 49 from the Joint Admissions and Matriculation Board (JAMB) Physics 2011 Objective paper, with the correct answer and a full explanation.

A copper wire was subjected to a tensile stress of 7.7 x 10^7 Nm⁻². Calculate the tensile strain of the wire. [Young modulus = 1.1 x 10^11 Nm⁻²]

A. A. 7.0 x10⁻⁴Correct
B. B. 2.2 x 10⁻⁴
C. C. 2.0 x 10⁻³
D. D. 7.0 x 10⁻³

Explanation

Young modulus = Tensile stress/Tensile strain. Tensile strain = Tensile stress/Young modulus = (7.7x10^7)/(1.1x10^11) = 7.0x10⁻⁴.

Sign up free to unlock

Score tracking
Practice history
Saved questions
Progress dashboard
Personalized sessions
Weak-topic breakdown

…and/or go further with premium services and No Ads.

Create free account

More questions from Physics 2011 Objective More Physics past papers