Question

If a current of `1 A` passing through a circuit generates `2 W` of power, what is the resistance of the circuit?

Answer 1

`2` ohms

Explanation:

For `R =` resistance (in Ohms)
and `I=` current (in Amperes)
and `P =` power (in Watts)

`P=RxxI^2 rarr R=P/(I^2)`

Given
`color(white)("XXX")P=2W`
and
`color(white)("XXX")I=1A`

`R=2/1^2` Ohms `=2` Ohms