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PRACTICAL ACTIVITIES (cont’d)
Method: You will be provided with a set of 1% tolerance resistors and a high impedance
(digital) voltmeter. Design a suitable circuit and have the supervisor check it before
switching on.
Use the circuit to find the average time it takes for the p.d. to reduce to half its initial
value. Vary the value of R to obtain sufficient data to plot a suitable linear graph. Use
the graph to determine the given capacitance.
CXC A16/U2/07v01 90
