Question

Define one watt:

A
one joule per second
B
one second per joule
C
ten joules per second
D
voltage divided by current
E
resistance multiplied by voltage
Solution
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Watt is a SI unit of power which is defined as the energy per unit time i.e P=Et
Hence one watt is defined as one joule of energy used in one second.
W=Js

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