Question

A circuit with a resistance of `6 Omega` has a fuse that melts at `8 A`. Can a voltage of `54 V` be applied to the circuit without blowing the fuse?

Answer 1

I do not think so.

Explanation:

The current `i` in your circuit can be evaluated using Ohm's law:
`V=Ri`
so we get:
`i=V/R=54/6=9 A`
This is more than your fuse can withstand so it will blow!