Advertisements
Advertisements
प्रश्न
A copper and a steel wire of the same diameter are connected end to end. A deforming force F is applied to this composite wire which causes a total elongation of 1 cm. The two wires will have ______.
- the same stress.
- different stress.
- the same strain.
- different strain.
उत्तर
a and d
Explanation:
As we know stress = `F/A`
The areas of cross-sections of both wires are the same, and the force with which they get stretched is also the same. Hence the total stress for both is the same. Hence option a.
Strain = Stress/Y
As stresses are the same on both,
Strain `∝ 1/Y` (steel) and strain `∝ 1/Y` (Al)
Strain (steel)/Strain (Al) = Y(Al)/Y(steel)
Now, Y(Al) < Y(Steel).
Hence, strain(steel) < Strain (Al)
Hence, option d is correct.
APPEARS IN
संबंधित प्रश्न
Which of the following does NOT affect the elasticity of substance?
A copper and a steel wire of the same diameter are connected end to end. A deforming force F is applied to this composite wire which causes a total elongation of 1 cm. The two wires will have ______.
- the same stress.
- different stress.
- the same strain.
- different strain.
Two identical solid balls, one of ivory and the other of wet-clay, are dropped from the same height on the floor. Which one will rise to a greater height after striking the floor and why?
