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question_answer1)
The graph shown was obtained from experimental measurements of the period of oscillations T for different masses M placed in the scale pan on the lower end of the spring balance. The most likely reason for the line not passing through the origin is that the [NCERT 1978]
A)
Spring did not obey Hooke's Law done
clear
B)
Amplitude of the oscillations was too large done
clear
C)
Clock used needed regulating done
clear
D)
Mass of the pan was neglected done
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question_answer2)
A graph is shown between stress and strain for a metal. The part in which Hooke's law holds good is
A)
OA done
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B)
AB done
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C)
BC done
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D)
CD done
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question_answer3)
In the above graph, point B indicates
A)
Breaking point done
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B)
Limiting point done
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C)
Yield point done
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D)
None of the above done
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question_answer4)
In the above graph, point D indicates
A)
Limiting point done
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B)
Yield point done
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C)
Breaking point done
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D)
None of the above done
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question_answer5)
The strain-stress curves of three wires of different materials are shown in the figure. P, Q and R are the elastic limits of the wires. The figure shows that
A)
Elasticity of wire P is maximum done
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B)
Elasticity of wire Q is maximum done
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C)
Tensile strength of R is maximum done
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D)
None of the above is true done
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question_answer6)
The diagram shows a force-extension graph for a rubber band. Consider the following statements[AMU 2001]
It will be easier to compress this rubber than expand it Rubber does not return to its original length after it is stretched The rubber band will get heated if it is stretched and released Which of these can be deduced from the graph
A)
III only done
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B)
II and III done
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C)
I and III done
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D)
I only done
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question_answer7)
The stress versus strain graphs for wires of two materials A and B are as shown in the figure. If \[{{Y}_{A}}\] and \[{{Y}_{B}}\] are the Young ?s modulii of the materials, then [Kerala (Engg.) 2001]
A)
\[{{Y}_{B}}=2{{Y}_{A}}\] done
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B)
\[{{Y}_{A}}={{Y}_{B}}\] done
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C)
\[{{Y}_{B}}=3{{Y}_{A}}\] done
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D)
\[{{Y}_{A}}=3{{Y}_{B}}\] done
clear
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question_answer8)
The load versus elongation graph for four wires of the same material is shown in the figure. The thickest wire is represented by the line [KCET 2001]
A)
OD done
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B)
OC done
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C)
OB done
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D)
OA done
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question_answer9)
The adjacent graph shows the extension \[(\Delta l)\] of a wire of length 1m suspended from the top of a roof at one end with a load W connected to the other end. If the cross sectional area of the wire is \[{{10}^{-6}}{{m}^{2}},\] calculate the young?s modulus of the material of the wire [IIT-JEE (Screening) 2003]
A)
\[2\times {{10}^{11\,}}N/{{m}^{2}}\] done
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B)
\[2\times {{10}^{-11}}N/{{m}^{2}}\] done
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C)
\[3\times {{10}^{-12}}N/{{m}^{2}}\] done
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D)
\[2\times {{10}^{-13}}N/{{m}^{2}}\] done
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question_answer10)
The graph is drawn between the applied force F and the strain (x) for a thin uniform wire. The wire behaves as a liquid in the part [CPMT 1988]
A)
ab done
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B)
bc done
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C)
cd done
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D)
oa done
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question_answer11)
The graph shows the behaviour of a length of wire in the region for which the substance obeys Hook?s law. P and Q represent [AMU 2001]
A)
P = applied force, Q = extension done
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B)
P = extension, Q = applied force done
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C)
P = extension, Q = stored elastic energy done
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D)
P = stored elastic energy, Q = extension done
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question_answer12)
The potential energy U between two molecules as a function of the distance X between them has been shown in the figure. The two molecules are [CPMT 1986, 88, 91]
A)
Attracted when x lies between A and B and are repelled when X lies between B and C done
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B)
Attracted when x lies between B and C and are repelled when X lies between A and B done
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C)
Attracted when they reach B done
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D)
Repelled when they reach B done
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question_answer13)
The value of force constant between the applied elastic force F and displacement will be
A)
\[\sqrt{3}\] done
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B)
\[\frac{1}{\sqrt{3}}\] done
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C)
\[\frac{1}{2}\] done
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D)
\[\frac{\sqrt{3}}{2}\] done
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question_answer14)
The diagram shows stress v/s strain curve for the materials A and B. From the curves we infer that [AIIMS 1987]
A)
A is brittle but B is ductile done
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B)
A is ductile and B is brittle done
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C)
Both A and B are ductile done
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D)
Both A and B are brittle done
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question_answer15)
Which one of the following is the Young?s modulus (in N/m2) for the wire having the stress-strain curve shown in the figure
A)
\[24\times {{10}^{11}}\] done
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B)
\[8.0\times {{10}^{11}}\] done
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C)
\[10\times {{10}^{11}}\] done
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D)
\[2.0\times {{10}^{11}}\] done
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question_answer16)
The diagram shows the change x in the length of a thin uniform wire caused by the application of stress F at two different temperatures T1 and T2. The variations shown suggest that [CPMT 1988]
A)
\[{{T}_{1}}>{{T}_{2}}\] done
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B)
\[{{T}_{1}}<{{T}_{2}}\] done
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C)
\[{{T}_{1}}={{T}_{2}}\] done
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D)
None of these done
clear
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question_answer17)
A student plots a graph from his reading on the determination of Young?s modulus of a metal wire but forgets to label. The quantities on X and Y axes may be respectively.
A)
Weight hung and length increased done
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B)
Stress applied and length increased done
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C)
Stress applied and strain developed done
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D)
Length increased and weight hung done
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question_answer18)
The points of maximum and minimum attraction in the curve between potential energy (U) and distance (r)of a diatomic molecules are respectively
A)
Sand R done
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B)
T and S done
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C)
R and S done
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D)
S and T done
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question_answer19)
The stress-strain curves for brass, steel and rubber are shown in the figure. The lines A, B and C are for
A)
Rubber, brass and steel respectively done
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B)
Brass, steel and rubber respectively done
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C)
Steel, brass and rubber respectively done
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D)
Steel, rubber and brass respectively done
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