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A 10 mF capacitor was tested by a multimeter using resistance measuring range. If the multimeter reads zero, it can be concluded that
- a)the capacitor is alright
- b)the capacitor is fully charged
- c)the capacitor is open circuited
- d)the capacitor is short circuited
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
A 10 mF capacitor was tested by a multimeter using resistance measurin...
**Explanation:**
When a multimeter is used to measure resistance, it sends a small known current through the component being tested and measures the voltage drop across it. The resistance is then calculated using Ohm's Law (R = V/I).
In the given scenario, a 10 mF capacitor is being tested using the resistance measuring range of the multimeter. Here's why option 'D' is the correct answer:
1. **Capacitor Behavior:** A capacitor stores and releases electrical energy. In a fully charged capacitor, the voltage across its terminals is equal to the supply voltage. However, when a capacitor is being measured using a resistance measuring range, it does not indicate the charge or voltage across the capacitor.
2. **Theoretical Behavior:** In a perfect capacitor, the resistance value should be infinite since a capacitor does not allow DC current to pass through it. However, real-world capacitors have some leakage current due to imperfections in their dielectric material, which can lead to a small resistance value.
3. **Measurement Result:** When the multimeter reads zero resistance while measuring a capacitor, it indicates a short circuit. This means that the resistance measured is very low, close to zero. A short circuit occurs when there is a direct path for the current to flow without any significant resistance.
4. **Explanation:** In this case, the multimeter is reading zero resistance because the capacitor is acting like a short circuit. This could be due to a faulty capacitor where the dielectric material has broken down, causing a direct path for the current to flow. It could also be due to a fault in the multimeter or incorrect measurement setup.
Therefore, option 'D' is the correct answer as it indicates that the capacitor is short-circuited, resulting in zero resistance measurement.
When a multimeter is used to measure resistance, it sends a small known current through the component being tested and measures the voltage drop across it. The resistance is then calculated using Ohm's Law (R = V/I).
In the given scenario, a 10 mF capacitor is being tested using the resistance measuring range of the multimeter. Here's why option 'D' is the correct answer:
1. **Capacitor Behavior:** A capacitor stores and releases electrical energy. In a fully charged capacitor, the voltage across its terminals is equal to the supply voltage. However, when a capacitor is being measured using a resistance measuring range, it does not indicate the charge or voltage across the capacitor.
2. **Theoretical Behavior:** In a perfect capacitor, the resistance value should be infinite since a capacitor does not allow DC current to pass through it. However, real-world capacitors have some leakage current due to imperfections in their dielectric material, which can lead to a small resistance value.
3. **Measurement Result:** When the multimeter reads zero resistance while measuring a capacitor, it indicates a short circuit. This means that the resistance measured is very low, close to zero. A short circuit occurs when there is a direct path for the current to flow without any significant resistance.
4. **Explanation:** In this case, the multimeter is reading zero resistance because the capacitor is acting like a short circuit. This could be due to a faulty capacitor where the dielectric material has broken down, causing a direct path for the current to flow. It could also be due to a fault in the multimeter or incorrect measurement setup.
Therefore, option 'D' is the correct answer as it indicates that the capacitor is short-circuited, resulting in zero resistance measurement.
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A 10 mF capacitor was tested by a multimeter using resistance measuring range. If the multimeter reads zero, it can be concluded thata)the capacitor is alrightb)the capacitor is fully chargedc)the capacitor is open circuitedd)the capacitor is short circuitedCorrect answer is option 'D'. Can you explain this answer?
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