What will an ohmmeter reading show across a blown fuse that is removed from the circuit?

When you measure the resistance across a blown fuse using an ohmmeter, it will show infinity. This occurs because a blown fuse has an open circuit, meaning that there is no continuous path for the current to flow. When the circuit is open, the ohmmeter cannot detect any resistance, resulting in a reading of infinity.

In practical terms, this indicates that the fuse has failed and needs to be replaced, as a functional fuse would show a low resistance value, allowing current to flow. Understanding this principle is important in diagnosing electrical issues in gas appliances and ensuring safe operation.