Class 9 Physics · Chapter 6 · Test 4
Springs and Elasticity
34 MCQs
34 questions · 15 min · 34 marks
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Sample questions
The first 5 of 34. Try each one, then tap to see the answer.
Question 1
The property of a material by which it returns to its original shape after the deforming force is removed is called:
- ADensity
- BElasticity
- CPressure
- DPlasticity
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Answer: B
Elasticity is the ability of a material to regain its original shape and size after removal of the deforming force, provided its elastic limit is not exceeded.
Question 2
A force that changes the shape or dimensions of an object is called a:
- AGravitational constant
- BSpring constant
- CDeforming force
- DPressure unit
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Answer: C
A deforming force changes the shape or dimensions of an object.
Question 3
Which material is given as an example of an inelastic material in the textbook?
- ASteel
- BGlass
- CSpring steel
- DPlasticine
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Answer: D
Plasticine does not regain its original shape after the deforming force is removed.
Question 4
A spring returns to its original length after a small load is removed. This behaviour demonstrates:
- AElasticity
- BPermanent deformation
- CIncreasing density
- DAtmospheric pressure
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Answer: A
Returning to the original length after removal of a load is elastic behaviour.
Question 5
Within the elastic limit, Hooke's law states that extension is directly proportional to:
- AThe density of the spring
- BThe applied force
- CThe area of the floor
- DAtmospheric pressure
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Answer: B
Hooke's law states that extension is directly proportional to applied force within the elastic limit.
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