Question

A capacitor of 1 mF and voltage rating 6 kV and another capacitor 2mF and voltage rating 4kV. Then their series and parallel combination can withstand a maximum of –

• A. (a) 9kV, 4Kv
• A. (b) 9 kV, 6 kV
• A. (c) 9 kV, 9 kV
• A. (d) None

Answer 1

(a)

C₁ : V_max = 6 kV, Q_max = 6 mC

C₂ : V_max = 4 kV, Q_max = 8 mC

(i) for series combination

Q_max = 6 mC, C_eq = 2/3 mF

\ V_max = $\frac { \mathrm { Q } _ { \max } } { \mathrm { C } _ { \mathrm { eq } } }$ = 9 kV

(ii) for parallel V_max = 4 Kv