K.C.S.E Physics Q & A - MODEL 2010PP2QN15

K.C.S.E Physics Q & A - MODEL 2010PP2QN15

​(a) Figure 8, shows a circuit that may be used to charge a capacitor.

​(i) state the observation on the milliameter when the circuit is switched on:
(ii) explain the observation in (î) above. 
(b) The circuit in figure 8 is left on for some time. State the value of p.d. across:
(j) the resistor R; 
(ii) the capacitor C; 
(c) sketch the graph of potential difference (V) across R against time. 
(d) Figure 9 shows three capacitors connected to a 10V battery.

Calculate:
(î) the combined capacitance of the three capacitors; 
(ii) the charge on the 5.0 uF capacitor. 

answers

(a) (1) High current which falls off to zero. 
(ii) Current flows when the capacitor is charging. When fully charged current stop (no current) and p.d. is equal to charging voltage.