A circuit contains two resistors ( 10 and 20 ) and two capacitors (12 F-\' and 6

Question

A circuit contains two resistors ( 10 and 20 ) and two capacitors (12 F-' and 6 F) connected t0 3 6 V battery, as shown in the diagram above. The cir his been connected for a long, time. Calculate the total capacitance of the circuit. Calculate the current in the 10 resistor. Calculate the potential difference between point A and B. Calculate the charge stored on one plate of the 6 F capacitor. The wire is cut at point P. Will the potential difference between points A and B in , decrease, or remain the same?

Explanation / Answer

a) (12*6)/18F=4F

b) 6V/(10+20)=0.2A

c) v()=V*R20/(R10+R20)=4V

d) 4F*4V=160E-6C,capacitors in series have same Q

e) remain the same, because at steady state (no back emf),a cap acts like an open

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