A technician reads 0 ohms (continuity) across an open switch. This indicates the switch is:
- AOpen and functioning correctly — showing no resistance
- BClosed or internally shorted — it should show high resistance or OL when open
- CDisconnected from the circuit
- DShowing normal resistance for that switch type
Correct Answer
Closed or internally shorted — it should show high resistance or OL when open
Explanation
An open switch should show infinite resistance (OL). A reading of 0 ohms across an 'open' switch means it is internally shorted — it cannot interrupt the circuit and must be replaced.