When testing a capacitor Quiz Practice Quiz | When…

Q: What is the primary tool used to test a capacitor's capacitance?

Multimeter with a capacitance function — Multimeters with capacitance function directly measure capacitance.

Q: When testing a capacitor with a multimeter, what should you do first?

Discharge the capacitor if it's charged. — Discharging prevents potential damage to the multimeter or yourself.

Q: What does a multimeter typically indicate when testing a good capacitor?

A brief resistance reading that increases to infinite. — A good capacitor charges and blocks DC, reading initially low then infinite.

Q: What does it mean if a capacitor reads a very low or zero resistance during a multimeter test?

The capacitor is shorted. — A shorted capacitor provides a direct path, resulting in low or zero resistance.

Q: What does it mean if a capacitor reads infinite resistance (open circuit) during a multimeter test?

The capacitor is open (bad). — An open capacitor has a broken internal connection.

Q: When testing an electrolytic capacitor, which lead on the multimeter should connect to the positive (+) capacitor terminal?

The red lead (positive). — Electrolytic capacitors are polarized and must be connected correctly.

Q: What is the primary function of a capacitor in a circuit?

To store electrical energy. — Capacitors store energy in an electric field.

Q: What does capacitance measure?

The ability to store electrical charge. — Capacitance is the measure of a capacitor's ability to store charge.

Q: What unit is capacitance measured in?

Farads (F) — The standard unit of capacitance is the Farad.

Q: If a capacitor is reading far higher than its rated capacitance, what might be the problem?

The capacitor has increased capacitance due to aging or damage. — Over time, capacitors can degrade and change in value.

Question 1 of 15

What is the primary tool used to test a capacitor's capacitance?

Multimeters with capacitance function directly measure capacitance.

Question 2 of 15

When testing a capacitor with a multimeter, what should you do first?

Discharging prevents potential damage to the multimeter or yourself.

Question 3 of 15

What does a multimeter typically indicate when testing a good capacitor?

A good capacitor charges and blocks DC, reading initially low then infinite.

Question 4 of 15

What does it mean if a capacitor reads a very low or zero resistance during a multimeter test?

A shorted capacitor provides a direct path, resulting in low or zero resistance.

Question 5 of 15

What does it mean if a capacitor reads infinite resistance (open circuit) during a multimeter test?

An open capacitor has a broken internal connection.

Question 6 of 15

When testing an electrolytic capacitor, which lead on the multimeter should connect to the positive (+) capacitor terminal?

Electrolytic capacitors are polarized and must be connected correctly.

Question 7 of 15

What is the primary function of a capacitor in a circuit?

Capacitors store energy in an electric field.

Question 8 of 15

What does capacitance measure?

Capacitance is the measure of a capacitor's ability to store charge.

Question 9 of 15

What unit is capacitance measured in?

The standard unit of capacitance is the Farad.

Question 10 of 15

If a capacitor is reading far higher than its rated capacitance, what might be the problem?

Over time, capacitors can degrade and change in value.

Question 11 of 15

Why is it important to consider the voltage rating of a capacitor when testing?

Exceeding the voltage rating can cause capacitor failure.

Question 12 of 15

What can happen to a capacitor if you apply reverse polarity to a polarized capacitor?

Reverse polarity can damage or destroy polarized capacitors.

Question 13 of 15

What's a common method to discharge a capacitor safely?

A resistor provides a safe and controlled discharge path.

Question 14 of 15

What tool would you use to observe a capacitor's charge and discharge behavior over time?

An oscilloscope displays voltage over time, showing the charging/discharging curve.

Question 15 of 15

What is 'leakage current' in the context of capacitor testing?

Leakage current indicates the capacitor isn't perfectly blocking DC.

When testing a capacitor Quiz