Technician 2022-2026T7D10
What reading indicates that an ohmmeter is connected across a large, discharged capacitor?
A
Answer
Practical circuits, troubleshooting, and measurements
Type
A
Increasing resistance with time
B
Decreasing resistance with time
C
Steady full-scale reading
D
Alternating between open and short circuit
Answer Notes
When an ohmmeter is connected to a discharged capacitor, the meter's internal battery begins to charge the component. Initially, the discharged capacitor acts like a short circuit, drawing maximum current which registers on the meter as near-zero resistance.
As the capacitor accumulates charge, it resists further current flow. The ohmmeter interprets this decreasing current as an increasing resistance over time.
Eventually, when the capacitor is fully charged to the meter's internal voltage, the current stops completely, and the meter will show an open circuit or infinite resistance.
Previous · T7D09
What is the characteristic appearance of a cold tin-lead solder joint?
Next · T7D11
Which of the following precautions should be taken when measuring in-circuit resistance with an ohmmeter?