EP025 Topic 2: Capacitor & Dielectrics

------------------------ is created out of two metal plates and an insulating material called a dielectric.

• An inductor
• A capacitor
• A fixed resistor
• A variable resistor

Tags

NGSS.HS-PS2-4

What is a capacitor?

• A device for storing energy.

• A device for storing p.d.

• A device for storing charge.

• A device for storing capacitance.

Tags

NGSS.HS-PS3-2

NGSS.HS-PS2-5

Capacitance is measured in___________

• Coulombs

• Farads

• Hz

• Volts

Charge is measured in_________

• Coulombs

• Farads

• Hz

• Volts

When 3 capacitors are arranged in series , the equivalent capacitance C is

• C_eq = C₁ + C₂ + C₃

• 1/C_eq = 1/C₁ + 1/C₂ + 1/C₃

• C_eq = QV₁ + QV₂ + QV₃

• C_eq = CR₁ + CR₂ + CR₃

When 3 capacitors are arranged in parallel , the equivalent capacitance is

• C_eq = C₁ + C₂ + C₃

• C_eq = 1/C₁ + 1/C₂ + 1/C₃

• C = QV₁ + QV₂ + QV₃

• 1/C_eq = 1/C₁ + 1/C₂ + 1/C₃

How is the capacitance of a parallel-plate capacitor affected by the potential difference across the capacitor ?

• C depend on the potential difference across the capacitor

• C does not depend on the potential difference across the capacitor

• C partially depend on the potential difference across the capacitor

• C sometime depend on the potential difference across the capacitor

How is the capacitance of a parallel-plate capacitor affected by the area of each plate?

• C is directly proportional to the area A of each plate

• C is inversely proportional to the area A of each plate

• C is partially proportional to the area A of each plate

• C is fully proportional to the area A of each plate

How is the capacitance of a parallel-plate capacitor affected by filling the space between the plates with an insulator ?

• C stable when the space between the plates is filled with an insulator, ε_r >1

• C reduces when the space between the plates is filled with an insulator, ε_r >1

• C increases when the space between the plates is filled with an insulator, ε_r >1

• C fluctuate when the space between the plates is filled with an insulator, ε_r >1

Tags

NGSS.HS-PS3-2

What is the symbol for dielectric permeativity.

• ε
• ε_r
• ε₀
• ε_rε₀