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Assertion : A change in the temperature ...

Assertion : A change in the temperature of a body cause change in dimentions.
Reason : The dimentions of a body decrease due to the increase in its temperature.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true and reason is not the correct explanation of assertion.

C

If assertion is true and reason is false.

D

If both assertion and reason are false.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the assertion-reason question, we need to evaluate both the assertion and the reason provided: ### Step 1: Analyze the Assertion The assertion states: "A change in the temperature of a body causes a change in dimensions." - **Explanation**: When the temperature of a body changes, the kinetic energy of its molecules changes as well. An increase in temperature causes the molecules to move more vigorously, which leads to an increase in the distance between them. This results in the expansion of the body. Conversely, if the temperature decreases, the molecules lose energy, come closer together, and the body contracts. Therefore, the assertion is **true**. ### Step 2: Analyze the Reason The reason states: "The dimensions of a body decrease due to the increase in its temperature." - **Explanation**: This statement is incorrect. When the temperature of a body increases, the dimensions of the body actually increase due to thermal expansion. The molecules move farther apart, leading to an increase in size. Thus, the reason is **false**. ### Step 3: Conclusion Based on the analysis: - The assertion is true. - The reason is false. ### Final Answer The correct evaluation is that the assertion is true, but the reason is false. Therefore, the correct option is that the assertion is true, and the reason is false. ---
To solve the assertion-reason question, we need to evaluate both the assertion and the reason provided: ### Step 1: Analyze the Assertion The assertion states: "A change in the temperature of a body causes a change in dimensions." - **Explanation**: When the temperature of a body changes, the kinetic energy of its molecules changes as well. An increase in temperature causes the molecules to move more vigorously, which leads to an increase in the distance between them. This results in the expansion of the body. Conversely, if the temperature decreases, the molecules lose energy, come closer together, and the body contracts. Therefore, the assertion is **true**. ### Step 2: Analyze the Reason ...
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Knowledge Check

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    B
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    B
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    B
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