How much resistance is typically measured across a normally closed switch?

When measuring the resistance across a normally closed switch, what you're observing is the characteristic of the switch when it is in its default, closed state, allowing current to flow through it. A normally closed switch, by design, is intended to have very low resistance when it is in the closed position.

The resistance measured is the result of the physical properties of the switch contacts, which typically allow for minimal resistance to ensure efficient current flow through the circuit. Values like 1.2 ohms align with the expected characteristics of most standard closed switches, allowing them to transfer power effectively without significant energy loss.

Resistance values that are significantly higher than this, such as those indicated in other choices, would suggest either a malfunction of the switch or improper contact, which isn’t typical for a normally closed switch functioning correctly.