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Flashcards on Capacitors and Dielectrics
Click on the flashcard to see the answer
What is a capacitor?
A device that stores and releases electrical energy.
What is a dielectric?
An insulating material used between capacitor plates to increase capacitance.
What is the unit of capacitance?
Farad (F)
What is the charge stored by a capacitor?
Q = CV
What is the energy stored in a capacitor?
E = 1/2 CV²
What happens to the capacitance when the distance between the plates increases?
The capacitance decreases.
What happens to the capacitance when the area of the plates increases?
The capacitance increases.
What does the dielectric constant (κ) represent?
The ability of a material to store electrical energy in a capacitor.
What is the formula to calculate the capacitance of a parallel plate capacitor?
C = (κε₀A)/d
What happens to the dielectric constant when the capacitance increases?
The dielectric constant increases.
What happens to the dielectric constant when the distance between the plates increases?
The dielectric constant remains constant.
What happens to the dielectric constant when the area of the plates increases?
The dielectric constant remains constant.
What is the effect of a dielectric on the electric field between the capacitor plates?
The electric field decreases.
What is the effect of a dielectric on the potential difference across the capacitor plates?
The potential difference remains the same.
What is used to measure the capacitance of a capacitor?
A capacitor meter.
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Test Your Knowledge
What is the unit of capacitance?
Volts (V)
Amperes (A)
Farad (F)
Watts (W)
Check Answers
What is the charge stored by a capacitor?
Q = CR
Q = IR
Q = CV
Q = PV
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What happens to the capacitance when the area of the plates increases?
The capacitance remains the same.
The capacitance increases.
The capacitance decreases.
The capacitance becomes zero.
Check Answers
What is the formula to calculate the capacitance of a parallel plate capacitor?
C = Q/V
C = (κε₀A)/d
C = E/Q
C = R/V
Check Answers
What happens to the dielectric constant when the capacitance increases?
The dielectric constant decreases.
The dielectric constant increases.
The dielectric constant remains constant.
The dielectric constant becomes zero.
Check Answers
What is the effect of a dielectric on the electric field between the capacitor plates?
The electric field increases.
The electric field decreases.
The electric field remains the same.
The electric field becomes zero.
Check Answers
What does the dielectric constant (κ) represent?
The charge stored by the capacitor.
The energy stored in the capacitor.
The ability of a material to store electrical energy in a capacitor.
The potential difference across the capacitor plates.
Check Answers
What happens to the dielectric constant when the distance between the plates increases?
The dielectric constant remains constant.
The dielectric constant increases.
The dielectric constant decreases.
The dielectric constant becomes zero.
Check Answers
What is the effect of a dielectric on the potential difference across the capacitor plates?
The potential difference increases.
The potential difference decreases.
The potential difference remains the same.
The potential difference becomes zero.
Check Answers
What is used to measure the capacitance of a capacitor?
A capacitor meter.
A voltmeter.
An ammeter.
A multimeter.
Check Answers
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