You will need
• capacitor, voltmeter
Instruction
1
To find the charge of the capacitorconnected to the DC voltage source, multiply the capacity of the capacitor to the voltage value, i.e. use the formula:
Q=UC, where:
Q – the charge of the capacitor, in coulombs,
U is the voltage source voltage, in volts,
C is the capacitance of the capacitor, in farads.
Note that the above formula determines the amount of the chargeand a fully charged capacitor. But as chargeka of the capacitor is fast enough, then practice using this pattern.
2
The supply voltage can be measured with a voltmeter. To do this, switch the mode to measure DC voltage and connect the terminals of the device to the power source. Record the readings in volts.
3
To know the capacity of the condenser can read the markings on its body. Note that the unit of capacitance Farad (f) is very large, so in practice is rarely used. To denote capacitors are used in smaller units. This MFD (UF), equal to one millionth Farad and picofarad (pF), equal to one millionth of a microfarad.
1 µf=10-6 f 1 pF = 10-12 F.
Sometimes used and the intermediate unit capacity – nanofarad equal to one billionth of a Farad.
1 nF = 10-9 F.
4
If the capacitor is small, the capacity is indicated using callouts.
Carefully read the label of the capacitor, paying attention to its color.If the condenser are just two digits, it is his capacity in picofarads.
For example, the inscription of "60" would mean a capacity of 60 pF.
5
If the capacitor has one uppercase letter or number, then find in the table below, the numeric znacheniya 1.0 I R Y 1.8 3.3 5.6
B J S 1.1 2.0 3.6 6.2 Z
C K T 1.2 2.2 3.9 6.8 3
D 1.3 L 2.4 V 4.3 4 7.5
E 1.5 N 2.7 W 4.7 7 8.2
H O 1.6 3.0 5.1 9.1 X 9 and, depending on the color of the capacitor, multiply it by the corresponding multiplier:Black - 1
Black - 10
Green - 100
Blue - 1.000
Purple - 10.000
Red - 100.000 Example:
H on the orange capacitor is 1.6 * 1 = 1,6 pF
E on the green capacitor is 1.5 * 100 = 150 pF
9 on the blue capacitor and 9.1 * 1000 = 9100 pF
6
If the capacitor is found the inscription, consisting of one capital letter and standing next to the numbers, then find the table below as appropriate (the letter) numeric value, and multiply it by 10 to the extent that is specified after the letter.A 10 G 18 N 33 U 56
B 11 H 20 P 36 V 62
C 12 Q J 22 W 39 68
D 13 K 24 R 43 X 75
E L S 15 27 47 82 Y
F 16 M 30 T 51 Z 91Например:
B1 - 11 * (10) = 110 pF
F3 - 16 * (10*10*10) = 16 000 pF=16нФ=0,016 UF