Question

What is the electric current produced when a voltage of `9 V` is applied to a circuit with a resistance of `30 Omega`?

Answer 1

`0.3"A"`

Explanation:

Use the equation `I = V/R` to find:

`I = 9/30 = 3/10 = 0.3"A"`

One way to remember the relationship between voltage `V`, current `I` and resistance `R` is the `VIR` triangle:

This can be read as `V = I*R`, `I = V/R` or `V/I = R`