Capacitors and Dielectrics

When capacitors is arrange in series (3 capacitors), the equivalent capacitance C is

• C = C₁ + C₂ + C₃

• 1/C = 1/C₁ + 1/C₂ + 1/C₃

• C = QV₁ + QV₂ + QV₃

• C = CR₁ + CR₂ + CR₃

When capacitors in parallel (3 capacitors), the equivalent capacitance is

• C = C₁ + C₂ + C₃

• C = 1/C₁ + 1/C₂ + 1/C₃

• C = QV₁ + QV₂ + QV₃

• C = QV₁ + QV₂ + QV₃

The energy stored in the capacitor can be find by using this equation EXCEPT

• 1/2QV

• 1/2Q²/C

• 1/2CV²

• 1/2RC²

During charging a capacitor through a resistor

• the current in the circuit increases linearly with time

• the current in the circuit decreases linearly with time

• the current in the circuit increases exponentially with time

• the current in the circuit decreases exponentially with time

During discharging a capacitor through a resistor

• the current in the circuit increases linearly with time

• the current in the circuit decreases linearly with time

• the current in the circuit increases exponentially with time

• the current in the circuit decreases exponentially with time

How is the capacitance (C) of a parallel-plate capacitor affected by the charge on the plates ?

• C depend on the charge on the plates

• C is vanished when there are plates

• C does not depend on the charge on the plates

• C is accumulated on one side only

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 the distance between the plates ?

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

• C is inversely proportional to the distance d between the plates

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

• C is not affected by 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-PS2-4