Question

1 watt =
A) 1 Js
B) 1 sJ^-1
C) 1 Js^-1
D) 1J/s^-2

Answer 1

1 watt= 1 Joule per second

Answer 2

Yello,
Your answer is Option (C).
How ? Check out below.


Watt is a unit of Power.
So,
Power formula is

$P = \frac{W}{t}$
As Work = Force(f) × Displacement in the direction of force.(s)

Therefore,
$P = \frac{f \times s}{t}$

As force unit is Kgm/s^2.
As displacement unit is m.
As time unit is s.

Therefore :

Formula will be

$P = \frac{kgms^{ - 2} \times m }{s} = \frac{kgm^{2} }{ {s}^{3} } = kgm^{2} {s}^{ - 3}$
P = kg×m^2×s^(-3)
= Watt

Also Work done unit = kg×m^2×s^(-2)
= Joule(J)

Therefore Power = J/s (because work is J and time is t)
= J×s^(-1)

Watt = 1Js^(-1)
So the correct option is (C).

(Dont forget ! Energy and work done have same units.)



Hope you find my answer useful and hope you mark my answer as brainliest !