Conductors and Dielectrics and Capacitors

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

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 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 distance d between the plates

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

• C is not affected by the a distance d between the plates

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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

The capacitance of a parallel-plate capacitor is: 

• proportional to the plate area 
• proportional to the charge stored 
• independent of any material inserted between the plates 
• proportional to the potential difference of the plates