What happens to total capacitance when two capacitors are connected in parallel?

What happens to total capacitance when two capacitors are connected in parallel?

• A. More
• B. The same
• C. Less
• D. Zero

Answer: (A)

When capacitors are connected in parallel, the total capacitance increases because capacitances add together. Each capacitor has the same voltage across it, so the total charge stored is Q_total = Q1 + Q2 = C1 V + C2 V. The effective capacitance is defined as C_eq = Q_total / V, which becomes C_eq = C1 + C2. So the combined device can store more charge at the same voltage than either capacitor alone. A helpful intuition is to think of parallel as expanding the plate area that can hold charge, so more charge can be stored without raising the voltage.

When capacitors are connected in parallel, the total capacitance increases because capacitances add together. Each capacitor has the same voltage across it, so the total charge stored is Q_total = Q1 + Q2 = C1 V + C2 V. The effective capacitance is defined as C_eq = Q_total / V, which becomes C_eq = C1 + C2. So the combined device can store more charge at the same voltage than either capacitor alone. A helpful intuition is to think of parallel as expanding the plate area that can hold charge, so more charge can be stored without raising the voltage.