Given below are two statements: 
Assertion (A): Elastomers are used as vibration dampers.
Reason (R): Elastomers show elastic hysteresis.
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.

 
Subtopic:  Elasticity |
 77%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Given below are two statements: 
Assertion (A): The bridges are declared unsafe after long use.
Reason (R): The bridges lose their elastic strength with time.
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.

 
Subtopic:  Elasticity |
 93%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

A copper and a steel wire of the same diameter are connected end to end. A deforming force \(F\) is applied to this composite wire which causes a total elongation of \(1\) cm. The two wires will have:

a. the same stress
b. different stress
c. the same strain
d. different strain

Choose the correct option:

1. (a, b)
2. (a, d)
3. (b, c)
4. (c, d)

Subtopic:  Elasticity | Stress - Strain |
 78%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

A rod of length l and negligible mass is suspended at its two ends by two wires of steel (wire A) and aluminium (wire B) of equal lengths (figure). The cross-sectional areas of wires A and B are 1.0 mm2 and 2.0 mm2 respectively. (YAl=70×109 N/m2 and Ysteel=200×109 N/m2)



 

a. Mass m should be suspended close to wire A to have equal stresses in both wires.
b. Mass m should be suspended close to B to have equal stresses in both wires.
c. Mass m should be suspended in the middle of the wires to have equal stresses in both wires.
d. Mass m should be suspended close to wire A to have equal strain in both wires.

The correct statements are:

1. (b, c)

2. (a, d)

3. (b, d)

4. (c, d)

Subtopic:  Elasticity | Stress - Strain |
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh