Author Name: Leandrou Vasilis
OBJECTIVES
This report aims to:

Introduction of a capacitor.

The basic construction of a capacitor.

Factors that effect its ability to store charge on its plate.
BACKGROUND THEORY
In this experiment will be used a power supply, 100μf capacitor and 100 KΩ resistor.

Power supplies gives a source of power, rated as maximum voltage and current output

Capacitor is an element constructed simply of two surfaces separated by the air gap. The capacitor displays its true characteristics only when a change in the voltage or current is made in the network.
EQUIPMENT
· Power supply (GW GPS3030PP, Serial Number: EG820606)
· One 100KΩ resistor
· One 100μF Capacitor
EXPERIMENTAL METHOD AND PROCEDURE
Part 1
The 20V power supply was connected in series with the 100KΩ resistor and the 100μf capacitor. The voltage across the capacitor during charging and discharging in any τ was measured (table 1a, 1b). Then the voltage across the resistor during charging and discharging in any τ was measured (table1a, 1b). τ=RC. The current through the capacitor was calculated (table1a, 1b) using the following equation: iR = Vc / R
OBSERVATIONS
t 
7,6s 
15.2s 
22.8s 
30.4s 
38s 
Vc 
9.6V 
14.6V 
16.6V 
17.6V 
18.1V 
VR 
9.9V 
15.2V 
3.1V 
2.1V 
1.6V 
iR (μA) 
101.2 
53.2 
31.7 
21.5 
16.35 
Table 1a capacitor during charging
t 
7,6s 
15.2s 
22.8s 
30.4s 
38s 
Vc 
7.7V 
3.8V 
2V 
1V 
0.5V 
VR 
8.1V 
4.1V 
2.1V 
1.1V 
0.6V 
iR (μA) 
82.8 
41.9 
21.5 
11.2 
6.1 