7.3 Capacitance

• What is capacitance measured in?

  Farads (F)
• Capacitance describes how much charge a component can store for a given potential difference.


  True
• Match the capacitance value with its typical application:

  Microfarad (μF) ↔️ Small electronic components

  Millifarad (mF) ↔️ Larger power applications

  Picofarad (pF) ↔️ Specialized high-frequency circuits
• Larger plate areas increase capacitance because there is more space to store charge.


  True
• What is the typical application for picofarad capacitors?

  High-frequency circuits
• Decreasing the distance between plates increases capacitance.

  True
• What is the effect of increasing the area of the plates on capacitance?

  Increases
• Capacitance is defined as the ratio of the charge stored to the potential difference
• The formula for capacitance in terms of charge and potential difference is C = \frac{Q}{V}
• The Farad is a very large unit, so capacitance is usually measured in practical sub-units like microfarads and picofarads
• Match the capacitance unit with its value in Farads:

  Microfarad ↔️ 1 \times 10^{ - 6}</latex> F

  Millifarad ↔️ $1 \times 10^{ - 3}$ F

  Picofarad ↔️ $1 \times 10^{ - 12}$ F

  Farad ↔️ 1 F
• What is the formula for capacitance in terms of area, distance, and permittivity?

  $C =$$\frac{\varepsilon A}{d}$
• Higher permittivity of the dielectric material increases capacitance


  True
• Ceramic capacitors are known for their high stability and low cost.
• Higher capacitance in a capacitor leads to more stored energy.
• What is one primary use of capacitors in timing circuits?

  Precise timing control
• Capacitance is the ratio of charge to potential difference
• What is the formula for capacitance?

  C = \frac{Q}{V}</latex>
• The formula for capacitance expresses the ratio of stored charge to potential difference.


  True
• The sub-unit of capacitance called the picofarad is written as pF
• Decreasing the distance between the plates of a capacitor increases its capacitance
• Sub-units of capacitance allow us to work with more manageable values in real-world applications
• What happens to capacitance when using a dielectric with higher permittivity?

  Increases
• What is the effect of increasing the distance between the plates on capacitance?

  Decreases
• A capacitor with large plate areas, small plate separation, and a high permittivity dielectric will have high capacitance.


  True
• What is the unit of capacitance?

  Farad
• What does 'V' represent in the capacitance formula?

  Potential difference
• The unit of capacitance is the Farad
• Microfarads are commonly used in filter circuits.
• Picofarads are primarily used in high-frequency circuits.
• Increasing the area of the plates increases capacitance


  True
• Match the type of capacitor with its characteristic:

  Electrolytic ↔️ High capacitance, low stability

  Ceramic ↔️ High stability, low cost

  Film ↔️ Moderate capacitance, moderate cost
• Film capacitors are suitable for audio equipment due to their good capacitance and stability

  True
• Higher voltage across a capacitor significantly increases the stored energy

  True
• In the formula for capacitance, V represents the potential difference
• What is the definition of the Farad (F)?

  Unit of capacitance
• What are the three main factors affecting capacitance?

  Area, distance, permittivity
• What is the symbol for millifarad?

  mF
• Larger plate areas increase capacitance in capacitors.


  True
• The formula for capacitance in terms of area, distance, and permittivity is C = \frac{\varepsilon A}{d}