Question

A circuit with a resistance of `8 Omega` has a fuse with a capacity of `3 A`. Can a voltage of `22 V` be applied to the circuit without blowing the fuse?

Answer 1

Yes. The current produced by `22V` applied to a resistance of `8Omega` will be less than `3A`

Explanation:

You can use the `VIR` triangle as a mnemonic to help remember the relationship between voltage `V`, current `I` and resistance `R`

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

In our example, `V=22`, `R=8`, so `I = V/R = 22/8 = 2.75 < 3`