Home
Class 12
PHYSICS
In the following questions, a statement ...

In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as
(a) If both assertion and reason are true and reason is the correct explanation of assertion.
(b) If both assertion and reason are true but reason is not the correct explanation of assertion.
(c ) If assertion is true but reason is false.
(d) If assertion and reason are false.
Q. Assertion: The bridges are declared unsafe after long use.
Reason: Elastic strength of bridges losed with time.

A

Statement -1 is true , Statement -2 is True , Statement -2 is a correct explanation for Statement-1.

B

Statement-1 is True , Statement -2 is True , Statement-2 is NOT a correct explanation for statement-1.

C

Statement-1 is False, Statement - 2 is True.

D

Statement - 1 is True , Statement -2 is False.

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c ) If assertion is true but reason is false. (d) If assertion and reason are false. Q. Assertion: Strain is a unitless quantity. Reason: Strain is equivalent to force.

In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c ) If assertion is true but reason is false. (d) If assertion and reason are false. Q. Assertion: Steel is more elastic than rubber. Reason: Under a given deforming force steel is deformed less than rubber.

In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c ) If assertion is true but reason is false. (d) If assertion and reason are false. Q. Assertion: If length of a rod is doubled the breaking load remains unchanged. Reason: Breaking load is equal to the elastic limit.

In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c ) If assertion is true but reason is false. (d) If assertion and reason are false. Q. Assertion: The materials which have very small range of plastic extension are called brittle materials. Reason: if the stress is increased beyond the elastic limit, the material will break.

In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c ) If assertion is true but reason is false. (d) If assertion and reason are false. Q. Assertion: It is easiar to spray water in which some soap is dissolved. Reason: Soap is easier to spread.

In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c ) If assertion is true but reason is false. (d) If assertion and reason are false. Q. Assertion: The stress-strain behaviour varies from material to material. Reason: A rubber can be pulled to several times its original length and still returns to its original shape.

In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c ) If assertion is true but reason is false. (d) If assertion and reason are false. Q. Assertion: Lead is more elastic than rubber. Reason: if the same load is attached to lead and rubber wires of the same cross-sectional area, the strain of lead is very much less than that of rubber.

In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c ) If assertion is true but reason is false. (d) If assertion and reason are false. Q. Assertion: Stress is the internal force per unit area of a body. Reason: Rubber is more elastic than steel:

In the following question, a statement of assertion is followed byb a statement of reason, mark the correct choice as (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c ) If assertion is true but reason is false. (d) If both assertion and reason are false. Q. Assertion: Steel and brass are more elastic than copper and aluminium. Reason: That's why they are preferred in heavy-duty machines and in structural designs.

In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c ) If assertion is true but reason is false. (d) If assertion and reason are false. Q. Assertion: For small deformation, the stress and strain are proportional to each other. Reason: A class of solids called elastomers does not obey Hooke's law. Reason: A class of solids called elastomers does not obey Hooke's law.

DISHA-MECHANICAL PROPERTIES OF FLUIDS-Physics
  1. A 4.0 m long copper wire of cross sectional area 1.2 cm^(2) is stretch...

    Text Solution

    |

  2. A copper rod 2m long is stretched by 1mm. Strain will be -

    Text Solution

    |

  3. A wire of cross sectional area 3mm^(2) is just stretched between two f...

    Text Solution

    |

  4. The compressibility of water is 5 xx 10^(-10) m^(2)//N . If it is sub...

    Text Solution

    |

  5. The Young’s modulus of steel is 2 × 10^(11) N//m^(2) and its coefficie...

    Text Solution

    |

  6. For a given material the Young's modulus is 2.4 times that of its ri...

    Text Solution

    |

  7. A wire of length 1m is stretched by a force of 10N. The area of cross-...

    Text Solution

    |

  8. A stress of 1kg//mm^(2) is applied on a wire. If the modulus of elasti...

    Text Solution

    |

  9. A metallic wire is suspended by suspending weight to it. If S is longi...

    Text Solution

    |

  10. The lengths and radii of two wires of same material are respectively L...

    Text Solution

    |

  11. The ratio of radii of two wires of same material is 2 : 1. If these wi...

    Text Solution

    |

  12. A rod of length l and area of cross-section A is heated from 0^(@)C to...

    Text Solution

    |

  13. Which statements are false for a metal? (1) Y lt eta (2) Y = eta ...

    Text Solution

    |

  14. Which of the following relations are false (1) 3Y = K(1 - sigma) (...

    Text Solution

    |

  15. A bar of cross section A is subjected to equal and opposite tensile fo...

    Text Solution

    |

  16. A bar of cross section A is subjected to equal and opposite tensile fo...

    Text Solution

    |

  17. A bar of cross section A is subjected to equal and opposite tensile fo...

    Text Solution

    |

  18. Statement -1 : Steel is more elastic than rubber. Statement -2 : Un...

    Text Solution

    |

  19. Statement -1 : Bulk modulus of elasticity (K) represents incompressibi...

    Text Solution

    |

  20. In the following questions, a statement of assertion is followed by a ...

    Text Solution

    |