Question

A resistor uses energy at a rate of 2.50W when there is a current of 4.00A passing through it. What must be the potential difference across the resistor?1.25V1.50V0.625V10.0V

Answer 1

As we know

`P=\text{ V}* I;`

Where,

P= electric power= 2.50 W

V= potential difference= ?

I= current = 4.00A

Using above formula we get,

`\begin{gathered} P=V* I; \\ \therefore2.50=\text{ V}*4; \\ V=\text{ }(2.50)/(4)=\text{ 0.625V} \end{gathered}`

Final answer is :- 0.625 V