The point on stress-strain curve at which strain begins to increase even without increase in stress is called……
(A) elastic point
(B) yield point
(C) breaking point
(D) neck point
1 Answers
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A curve `y=f(x)` passes through point `P(1,1)` . The normal to the curve at `P` is a `(y-1)+(x-1)=0` . If the slope of the tangent at any point on the
Correct Answer - `y = e^(a(x-1)), (1+(e^(-a))/(a) - (1)/(2a))`
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Strain energy of a stretched wire is 18 × 10^-3 J and strain energy per unit volume of the same wire
Correct answer is (B) 3 m3
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Define stress and strain. What are their different types?
1. The internal restoring force per unit area of a both is called stress. \(\text{Stress} = \frac{\text{deforming force}}{\text{area}}\) \(=\frac{|\vec{F}|}{A}\) where \(\vec{F}\)is internal restoring force or external applied deforming force. 2. Types of stress : Longitudinal stress, Volume stress, Shearing...
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Find the slope of tengents drawn of the following curves at the given points: (i) Curve ` y =x^(3)+1` at point (0, 1) (ii) Curve ` x^(2)-y^(2)` = 20 a
Correct Answer - (i)0, (ii)`3/2`, (iii)1, (iv) m
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Find the equation of tangents of the following curves at the given points: (i) Curve`x^(2) = 25` at point (3, 4) (ii) Curve `y = 2x^(3) + 2x^(2) - 8x+
Correct Answer - (i) 3x+4y=25, (ii)2x-y+1=0, (iii) x-2y +4 =0, (iv) 3x-8y+25=0
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Find the equation of normals of the following curves at the given points: (i) Curve`y^(2)=4 ax" at point "(at^(2), 2at)`. (ii) Curve `y= e^(x)" at poi
Correct Answer - (i)`y+tx=2 at+at^(3)" "(ii) x+y=1` (iii)`x+3y=4" "(iv)x=y` (v)`3x+8y=50`
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A drunked person is 10 step away from a manhole. Suddenly he begins to walk towards the manhole. Suddenly he begins to walk towards the manhole. He wa
Correct Answer - (i) at `(1)/(3)sec("during"9^(th)"see), (ii) 26 steps
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Fill in the blanks : Succession that starts on a bare rock is called `……………..` and that which begins on sand is called `………..`.
Correct Answer - Lithosere , psammosere.
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Young’s modulus of material of wire is ‘Y’ and strain energy per unit volume is ‘E’, then the strain is
Correct option is: (C) \(\sqrt{\frac{2E}{Y}}\)
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The stress-strain curves are drawn for two different materials X and Y. It is observed that the ultimate strength point and the fracture
(C) Brittle and ductile Ductile materials have a fracture strength lower than the ultimate Tensile strength (i.e., the points are far apart.) whereas in brittle materials, the fracture strength is equivalent...
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