The correct answer is: A. show low resistance momentarily and back off to a very high resistance.
When an ohmmeter is connected to a capacitor, the capacitor will initially show a low resistance as the current flows through it. However, as the capacitor charges, the resistance will increase until it reaches infinity. This is because the capacitor is blocking the flow of current.
The time it takes for the resistance to increase depends on the capacitance of the capacitor. A capacitor with a larger capacitance will take longer to charge than a capacitor with a smaller capacitance.
If the capacitor is shorted, the ohmmeter will show a low resistance reading. If the capacitor is open, the ohmmeter will show a high resistance reading.
Here is a more detailed explanation of each option:
- Option A: This is the correct answer. When an ohmmeter is connected to a capacitor, the capacitor will initially show a low resistance as the current flows through it. However, as the capacitor charges, the resistance will increase until it reaches infinity. This is because the capacitor is blocking the flow of current.
- Option B: This is incorrect. The capacitor will not show a high resistance momentarily and then a very low resistance. The resistance will increase steadily until it reaches infinity.
- Option C: This is incorrect. The capacitor will not go quickly to 50 ohm approximately and remain there. The resistance will increase steadily until it reaches infinity.
- Option D: This is incorrect. The capacitor will not not move at all. The resistance will increase steadily until it reaches infinity.