Mechanical Properties of Solids Test

Result

Mechanical Properties of Solids Test - 17

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Question 1
4 / -1

The adjacent graph shows the extension (∆l) of a wire of length lm 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 m², calculate the young\'s modulus of the material of the wire

A
2 × 10¹¹ N/m²

B
2 × 10^–11 N/m²

C
3 × 10^–12 N/m²

D
2 × 10^–13 N/m²

Solution
Question 2
4 / -1

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

A
ab

B
bc

C
cd

D
oa
Question 3
4 / -1

The value of force constant between the applied elastic force F and displacement will be

A

B

C

D

Solution
Question 4
4 / -1

The diagram shown stress v/s strain curve for the materials A and B. From the curves we infer that

A
A is brittle but B is ductile

B
A is ductile and B is brittle

C
Both A and B are ductile

D
Both A and B are brittle
Question 5
4 / -1

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 × 10¹¹

B
8.0 × 10¹¹

C
10 × 10¹¹

D
2.0 × 10¹¹

Solution
Question 6
4 / -1

The points of maximum and minimum attraction in the curve between potential energy (U) and distance (r) of a diatomic molecules are respectively

A
S and R

B
T and S

C
R and S

D
S and T

Solution
Question 7
4 / -1

Two wires are made of the same material and have the same volume. However wire 1 has cross–sectional area A and wire 2 has cross–sectional area 3A. If the length of wire 1 increases by Δx on applying force F, how much force is needed to stretch wire 2 by the same amount?

A
F

B
4F

C
6F

D
9F

Solution
Question 8
4 / -1

The increase in length is l of a wire of length L by the longitudinal stress. Then, the stress is proportional to

A
L/l

B
l/L

C
l x L

D
l² x L

Solution
Question 9
4 / -1

The dimensions of four wires of the same material are given below. In which wire the increase in length will be maximum when the same tension is applied

A
Length 100 cm, Diameter 1 mm

B
Length 200 cm, Diameter 2 mm

C
Length 300 cm, Diameter 3 mm

D
Length 50 cm, Diameter 0.5 mm

Solution
Question 10
4 / -1

Which is the most elastic?

A
Iron

B
Copper

C
Quartz

D
Wood