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A lamp consumes 1000 J of electrical ene...

A lamp consumes 1000 J of electrical energy is 10 s. What is its power ?

Text Solution

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Here, electrical energy consumed, W = 1000 j
time in which this energy is consumed, t =10 s
Power fo the lamp, `P =(W)/(t) = (1000J)/(10s) = 100W`
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  • Assertion (A): A 200 W bulb consumes 2 units of electrical energy when it is used for 10 hours. Reason (R): 1 unit of electrical energy = 1000 kWh.

    A
    Both A and R are true and R is the correct explanation of A.
    B
    Both A and R are true, but R is not the correct explanation of A.
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    D
    Both A and R are false.

  • Assertion (A): A 200 W bulb consumes 2 units of electrical energy when it is used for 10 hours. Reason (R): 1 unit of electrical energy = 1000 kWh.

    A
    Both A and R are true 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.

  • Assertion (A): A 200 W bulb consumes 2 units of electrical energy when it is used for 10 hours. Reason (R): 1 unit of electrical energy = 1000 kWh.

    A
    (A) and (R) are correct and (R) is correct explanation for (A).
    B
    (A) and (R) are correct but (R) is not the correct explanation for (A).
    C
    (A) is correct but (R) is not correct.
    D
    Both (A) and (R) are not correct.

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    Examples on Electrical energy & Power

    Assertion (A): A 200 W bulb consumes 2 units of electrical energy when it is used for 10 hours. Reason (R): 1 unit of electrical energy = 1000 k Wh .

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