Physics, asked by aaryanaditya29, 4 months ago

can anybody please tell part a of this question

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Answered by Harshabadboy

11

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B. In physics, power is the amount of energy transferred or converted per unit time. In the International System of Units, the unit of power is the watt, equal to one joule per second. In older works, power is sometimes called activity. Power is a scalar quantity.

C. Power of electric kettle = 400W = 0.4kWTime used, t = 2.5 hENERGY used in= power × time taken 1 day = 0.4×2.5 = 1 kWh = 1 unit.Energy used in 20 days

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