Question 139Electricity & Electronics - QMED

70% to pass

If a digital multimeter is set up as shown in figure "A" of the illustration to test a capacitor, what would the display read if the capacitor is shorted? Illustration EL-0213

Diagram for USCG Electrical QMED: If a digital multimeter is set up as shown in figure "A" of the illustration to...
Athe ohmic value would read very high (OL ohms) and remain at that value
Bthe ohmic value would read very low and remain at that value
Cthe ohmic value would initially read very low, but over time the ohmic value would gradually rise to an extremely high value (OL ohms)
Dthe ohmic value would initially read very high (OL ohms), but over time the ohmic value would gradually drop to an extremely low value
AI Explanation

The correct answer is B) the ohmic value would read very low and remain at that value. When a capacitor is shorted, it behaves like a direct connection between the two terminals, resulting in a very low resistance or ohmic value. This is because a shorted capacitor essentially creates a direct path for the current to flow, bypassing the capacitive element. Therefore, the digital multimeter would display a very low ohmic reading that would remain constant, as the shorted capacitor continues to provide a low-resistance path. The other answer choices are incorrect because: A) a shorted capacitor would not read a very high resistance; C) the ohmic value would not gradually rise to an extremely high value; and D) the ohmic value would not initially read very high and then gradually drop to an extremely low value.

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