7.3 Capacitance

• What is capacitance a measure of?

  Ability to store charge
• What are the two main types of capacitors described in the material?

  Not specified
• Understanding the charging and discharging of a capacitor is essential for its applications in circuits.


  True
• Describe the relationship between capacitance, charge, and potential difference.

  1️⃣ Capacitance is directly proportional to charge.

  2️⃣ Capacitance is inversely proportional to potential difference.
• Which material increases capacitance when used between the plates of a capacitor?

  Ceramic
• What type of proportionality exists between capacitance and permittivity?

  Directly proportional
• What material property affects capacitance when placed between capacitor plates?

  Permittivity
• The equation for capacitance is C = Q/V
• Capacitors can be combined in series and parallel
• The unit of capacitance is the farad
• Capacitance is directly proportional to the area of the plates.


  True
• What effect does increasing the surface area of capacitor plates have on capacitance?

  Increases capacitance
• Using ceramic as a material between capacitor plates increases capacitance compared to air.


  True
• Decreasing the distance between plates increases the capacitance
• Capacitance is inversely proportional to the plate distance
• Capacitance is defined as the ratio of charge stored to potential difference
• Charge is defined as the amount of electric charge
• Smaller plate distance increases capacitance.


  True
• Arrange the factors affecting capacitance based on their effect.

  1️⃣ Plate area is directly proportional

  2️⃣ Permittivity is directly proportional

  3️⃣ Plate distance is inversely proportional
• Higher permittivity materials increase capacitance.


  True
• Cylindrical capacitors are known for their high voltage capability
• The reciprocal of the total capacitance in a series configuration is the sum of the reciprocals of the individual capacitances
• What happens to total capacitance in a series configuration as more capacitors are added?

  Decreases
• What is the total capacitance of two 10 μF capacitors connected in parallel?

  20 μF
• The energy stored in a capacitor is directly proportional to the square of the voltage.

  True
• If a capacitor with C = 4 \mu F</latex> is charged to $V =$$100 V$, what is the energy stored?


  $0.02 J$
• The unit of capacitance is the farad, which equals 1 coulomb per volt.
• The capacitance of a capacitor is directly proportional to its plate area.
• Match the type of capacitor with its key property:

  Parallel Plate ↔️ High capacitance, simple design

  Cylindrical ↔️ High voltage rating, durable

  Spherical ↔️ Uniform electric field, high capacitance
• The total capacitance in a series configuration is less than the smallest individual capacitance.


  True
• What are the two main configurations for connecting capacitors?

  Series and parallel
• Match the capacitor configuration with its property:

  Series ↔️ Same current through each

  Parallel ↔️ Same voltage across each
• A capacitor with $2 \mu F$ charged to $50 V$ stores 0.0025 J
• A $2 \mu F$ capacitor connected to a $10 kΩ$ resistor has a time constant of 20 ms
• Capacitance increases when the area of the plates decreases.

  False
• What two factors affect the capacitance of a parallel plate capacitor?

  Area and distance
• What is the unit of capacitance?

  Farad
• Larger plates provide more space to store electric charge, increasing the capacitance
• The formula for capacitance is $C =$$\frac{\varepsilon A}{d}$, where ε represents permittivity
• Capacitance is inversely proportional to the distance