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Assertion (A) : Solar heating devices ar...

Assertion (A) : Solar heating devices are painted black.
Reason (R) : Black bodies are good absorbers of heat, so temperature rises quickly.

A

Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B

Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C

Assertion (A) is true but reason (R) is false.

D

Assertion (A) is false but reason (R) is true.

Text Solution

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Knowledge Check

  • Assertion : All black coloured objects are considered black bodies. Reason : Black colour is a good absorber of heat

    A
    If both assertion and reason are true and the reason is the correct explanation of the assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of the assertion
    C
    If assertion is true reason is false
    D
    If assertion is false but reason is true.

  • Directions: In the following questions, a statement of assertion is followed by a statement of reason. Assertion : Dark coloured clothes are preferred in winters. Reason : Dark coloured objects are good absorbers of heat energy. 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 is false but reason is true.

  • Assertion (A): Black coloured clothes are preferred over white colored clothes in winter Reason (R ): Black is good absorber of radiation

    A
    both a and r are ture and r is the correct explanation of a
    B
    both a and r are true but r is not the correct explanation of a
    C
    a is true but r is false
    D
    both a and r are false

    • Similar Questions

    Explore conceptually related problems

    Black substances absorb and lose heat radiations faster.

    Assertion (A): Black coloured clothes are preferred over white coloured clothes in winter. Reason (R): Black is good absorber of radiations.

    If a black body is heated at a high temperature, it seems to be

    If a black body is heated at a high temperature, it seems to be

    If a black body is heated at a high temperature, it seems to be

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