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Standard VII

Physics

Energy

One watt-hour...

Question

One watt-hour is equivalent to :

3.6 \times 10^{3}

Joule

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3.6 \times 10^{- 3}

Joule

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6.3 \times 10^{3}

Joule

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6.3 \times 10^{- 3}

Joule

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Solution

The correct option is A $3.6 \times 10^{3}$ Joule
The SI unit of power is watt(W). The power of an agent is one watt when it does work at the rate of 1 joule per second or
$1 w a t t = \frac{1 j o u l e}{1 s e c o n d} = 1 W = 1 J s^{- 1}$
$1 w a t t - h o u r = 1 J \times 3600 = 3.6 \times 10^{3} J o u l e$

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One watt-hour is equivalent to :

The correct option is A 3.6×103 JouleThe SI unit of power is watt(W). The power of an agent is one watt when it does work at the rate of 1 joule per second or1 watt=1 joule1 second=1W=1 Js−11 watt−hour=1 J×3600=3.6×103Joule