Home
Class 11
PHYSICS
A piece of copper having a rectangular c...

A piece of copper having a rectangular cross-section of 15.2 mm `xx` 19.1 mm is pulled in tension with 44,500 N force, producing only elastic deformation. Calculate the resulting strain?

A

`4.6xx10^(-4)`

B

`3.6xx10^(-3)`

C

`5.6xx10^(-5)`

D

`1.6xx10^(-2)`

Text Solution

Verified by Experts

The correct Answer is:
2
Promotional Banner

Similar Questions

Explore conceptually related problems

A piece of copper having a rectangular cross section of 15.2 xx 19.1 mm is pulled in tension with 45,500N, force producing only elastic deformation. Calculate the resulting strain. Shear modulus of elasticity of copper is 42 xx 10^(9)Nm^(-2) .

A copper wire has a resistance of 10 Omega and an area of cross-section 1 mm^(2) . A potential difference of 10 V exists across the wire. Calculate the drift speed of electrons if the number of electrons per cubic metre in copper is 8xx10^(28) electrons.

A rectangular metallic bar one metre long, one cm deep and one cm broad is placed on a smooth table. The Young's modulus and modulus of rigidity of metal of the bar are 2 xx 10^(11) N//m^(2) and 8 xx 10^(10) N //m^(2) respectively. If the bar is rigidity clamped at one end is pulled at the other end with a force 5000 N applied normaly to its end cross-section, calculate the elongation of the bar and the work done in elongating the bar.

Speed of transverse wave in a string of density 100kg//m^(3) and area of cross-section 10mm^(2) under a tension of 10^(3) N is

A copper rod with length 1.4 m and area of cross-section of 2 cm^2 is fastened to a steel rod with length L and cross-sectional area 1 cm^2 . The compound rod is subjected to equal and opposite pulls to magnitude 6.00xx10^4 N at its ends . (a) Find the length L of the steel rod if the elongation of the two rods are equal . (b) What is stress in each rod ? (c ) What is the strain in each rod ? [Y_"steel"=2xx10^11 Pa , Y_(Cu)=1.1xx10^11 Pa]

An inductor coil of inductance 17 mH is constructed from a copper wire of length 100 m and cross - sectional are 1mm^2 . Calculate the time constant of the circuit if this inductor is joined across an ideal battery. The resistivity of copper = 1.7 X 10^(-8) Omega m.

A current of 1.34A exists in a copper wire of cross-section 1.0mm^(2) . Assuming eac copper atom contributes one free eectron. Calculate the drift speed of the free electrons in the wire. The density of copper is 8990 kg// m^(3) and atom ic mass=63.50.

A copper wire having cross- sectional area of 0.5 mm^2 and a length of 0.1 m is initially at 25^@C and is thermally insulated form the surrounding. If a current of 10A is set up in this wire, find the time in which the wire will start melting. For copper, resistivity is 1.6xx10^(-8)Omega m , density is 9,000 kgm^(-3) and specific heat capacity is 0.09 cal g^(-10)C^(-1). Melting temperature fo copper is 1075^@C

A wire of length 50 cm and cross sectional area of 1 sq. mm is extended by 1mm . The required work will be (Y=2xx10^(10) Nm^(-2))

Two wires one of copper and other of iron having same cross-section area and lengths 2 m and 1.5 m respectively are fastened end and stretched by a load 10 N. If copper wire is stretched by 2mm then find the total extension of combined wire, Y_(Cu)=1xx10^(11)N//m^(2) and Y_(Fe)=3xx10^(11)N//m^(2) .