6.2. Capacitance

• What is capacitance a measure of?

  Ability to store charge
• Capacitance (C) equals charge stored (Q) divided by voltage
• Capacitance (C) equals charge stored (Q) divided by voltage
• Why does a larger plate area increase capacitance?

  More surface for charge
• The formula $C =$$\frac{Q}{V}$ relates capacitance, charge, and voltage


  True
• What does the equation $Q =$$CV$ describe?


  Charge stored
• A larger plate area increases capacitance
• The formula for capacitance relates charge stored to the applied voltage
• The formula for capacitance is C = \frac{Q}{V}
• Match the term with its unit:

  Capacitance ↔️ Farad (F)

  Charge ↔️ Coulomb (C)

  Voltage ↔️ Volt (V)
• If a capacitor stores 0.5 Coulombs of charge at 10 Volts, its capacitance is 0.05 Farads.


  True
• Order the factors affecting capacitance from most direct to least direct effect:

  1️⃣ Plate Area (A)

  2️⃣ Plate Separation (d)

  3️⃣ Dielectric Material (κ)
• A capacitor stores 0.05 C of charge at 5 V. What is its capacitance?

  0.01 F
• What does the equation $C =$$\frac{Q}{V}$ describe?


  Capacitance equals charge divided by voltage
• What are the three main factors influencing capacitance?

  Plate area, separation, dielectric
• What is the formula for capacitance (C)?

  $C =$$\frac{Q}{V}$
• Charge is measured in Coulombs.
• How much charge can a capacitor hold per volt of voltage applied?

  Defined by capacitance
• Capacitance is defined as the ratio of charge stored to voltage across the capacitor


  True
• The formula for capacitance is C = \frac{Q}{V}</latex>

  True
• How does a higher dielectric constant affect capacitance?

  Increases it
• Capacitance is defined as the ratio of the amount of charge stored to the voltage
• What are the three main factors influencing capacitance?

  Plate area, separation, dielectric
• What happens to capacitance if the dielectric material is removed?

  Decreases
• If a capacitor stores 0.5 Coulombs of charge at 10 Volts, what is its capacitance?

  0.05 Farads
• The formula for capacitance is C = Q/V
• The amount of electrical charge stored is measured in Coulombs
• The capacitance of a capacitor is influenced by three main factors
• Using a dielectric material with a higher dielectric constant enhances capacitance.


  True
• A 20 μF capacitor connected to a 12 V battery stores 240 μC of charge.
• The three main factors influencing capacitance are plate area, plate separation, and dielectric material
• A smaller plate separation increases capacitance.


  True
• Using a dielectric material with a higher dielectric constant increases capacitance.
• Steps in how a capacitor stores charge

  1️⃣ Voltage is applied

  2️⃣ Electrons migrate to one plate

  3️⃣ Positive charges accumulate on the other

  4️⃣ An electric field is created
• Charge stored in a capacitor equals capacitance multiplied by voltage.

  True
• What creates the electric field between the plates of a charged capacitor?

  Accumulated charge
• What does the equation $E =$$\frac{1}{2}QV$ describe?


  Energy equals half charge times voltage
• Capacitance (C) equals charge stored (Q) divided by voltage
• What is the unit of capacitance?

  Farad
• How much charge can a capacitor hold per volt of voltage applied?

  Defined by capacitance