Define one watt:

one joule per second

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one second per joule

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ten joules per second

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voltage divided by current

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resistance multiplied by voltage

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Solution

The correct option is B one joule per second
Watt is a SI unit of power which is defined as the energy per unit time i.e $P = \frac{E}{t}$
Hence one watt is defined as one joule of energy used in one second.
$∴$ $W = \frac{J}{s}$

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Define one watt:

The correct option is B one joule per secondWatt is a SI unit of power which is defined as the energy per unit time i.e P=EtHence one watt is defined as one joule of energy used in one second.∴ W=Js

The correct option is B one joule per second
Watt is a SI unit of power which is defined as the energy per unit time i.e $P = \frac{E}{t}$
Hence one watt is defined as one joule of energy used in one second.
$∴$ $W = \frac{J}{s}$