1
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

A spring of force constant $$k$$ is cut into lengths of ratio $$1:3:4$$. They are connected in series and the new force constant is $$\mathrm{k}$$'. Then they are connected in parallel and force constant is $$\mathrm{k}$$''. Then $$\mathrm{k}^{\prime}: \mathrm{k}^{\prime \prime}$$ is

A
38.3
B
3.38
C
1.38
D
38.1
2
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

A copper and a steel wire of same diameter are connected end to end. A deforming force F$$_1$$ is applied to the wire which causes an elongation of 1 cm. The two wires will have

A
the same stress
B
different stress
C
the same strain
D
different strain
3
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

A force F applied on the wire of radius r and length L and change in the length of the wire is $$l$$. If the same force F is applied on the wire of the same material and radius 4r and length $$4l$$, then change in length of the other wire is,

A
$$\frac{l}{4}$$
B
$$2l$$
C
$$\frac{l}{2}$$
D
$$4l$$
4
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

Within the elastic limit, the corresponding stress is known as

A
tensile strength
B
yield strength
C
elastic fatigue
D
yield point
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