There are 4 questions attached. Thank you.

Two sheets of aluminium foil have a separation of 1 mm, a capacitance of 30 pF and are charged to 13 V. The separation is now decreased by 0.4 mm with the charge held constant. By how much does the potential difference change? A positive answer indicates an increase, while a negative answer indicates a decrease. Q B 10 n 2.0 UF At an instant when Q = 84 nC and VA - VB = -28 mV, determine the current in the circuit segment shown above. A negative sign in your answer represents current from left to right, while a positive current is right to left. 12 n Q B 2.0 UF At an instant when i = 6 mA and Q = 44 nC in the circuit segment shown above, what is the potential difference VA - VB? 10n D + B 2.0 UF 5.0 UF At an instant when i = 1 mA and Q = 43 nC in the circuit segment shown above, what is the potential difference VA - VB