charging a capacitor at a constant rate(C08)

... School True Light Girls' College Mark Name Tam Teresa (???) Class (Class No.) 6S (22) /10 Group No. 3 Date (dd-mm-yy) 20-05-2009 ============================================================= AL Physics TAS - Experimental Worksheet C08 - Charging a capacitor at a constant rate Time Allowed 2 periods Objective To investigate how the charge on a capacitor is related to the potential difference applied across it by charging the capacitor at a constant rate. Apparatus * Capacitor (electrolytic type) 500·F * Microammeter 100·A * Potentiometer 100k? * Clip component holder * Stop-watch * CRO (Cathode Ray Oscillator) * Connecting leads Theory From definition, the capacitance C of a capacitor is found from C=Q/V where Q is the charge stored on the capacitor and V is the potential difference across it. ==> Q = CV ==> = C If a capacitor is charged up at a constant rate, i.e. = I , where I is a constant , then is also constant. Hence the potential difference across the capacitor increases linearly with time. Procedure 1. Connect up the circuit as shown in Fig. (a). Set the CRO

want to read more? →