Charging a capacitor at a constant rate

... Experiment P: Charging a capacitor at a constant rate Date: 1/11/07 Marks : ______________ Aim: To investigate how the charge on a capacitor is related to the p.d. applied across it by charging the capacitor at a constant rate. Apparatus: o Capacitor (electrolytic type) 500 ?F o Microammeter 100 ?A o Clip component holder o Stop-watch o CRO o Connecting leads Theory: From definition, the capacitor 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 ==> If a capacitor is charged up at a constant rate, i.e. , where I is a constant. Then is also constant. Hence the potential difference across the capacitor increases linearly with time. Procedure 1. The circuit was connected as shown in the figure below. The CRO was set to d.c. and the sensitivity to 1 V/cm. 2. The time base was set to any high value so that a steady horizontal

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