1. ELECTRIC CURRENT SOURCES
Voltaic Elements
A glass jar that contains H2SO4 solution
Plate of platinum as a positive electrode (cathode)
Plate of Zinc (Zn) as a negative electrode (Anode)
The chemical reactions causes electrons from Zinc plate to flow to the platinum plate. So, if a bulb connected to these two poles, it will turn on

2. (H2SO4)

3. An ammeter is an instrument used to mesure current that passes through
measuring ELECTRIC CURRENT
An ammeter is an instrument used to mesure current that passes through
a node or another part of a circuit.
An ammeter to measure current is always connected in series in a circuit

4. MEASURING POTENTIAL DIFFERENCE
Voltmeter is an instrument used to measure voltage that passes across a circuit
A voltmeter to measure potetial is connected in parrallel

5. MEASURING CURRENT AND VOLTAGE
MAX. VALUE
SHUNT
An Ameter
BASICMETER UNIT +
MULTEPILER
SCALE SHOWN
Voltmeter
MAX. SCALE
Reading of scale in measure:
X = the scale show by the needle X the selected maximum scale
the value on the scale by the max scale
X = 42/60 X 20 = 14 V