ELECTRIC CURRENT SOURCES

Voltaic Elements

a. A glass jar that contains H2SO4 solutionb. Plate of platinum as a positive electrode (cathode)c. 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

(H2SO4)

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

MEASURING POTENTIAL DIFFERENCE

Voltmeter is an instrument used to measure voltage that passes across a circuitA voltmeter to measure potetial is connected in parrallel

MEASURING CURRENT AND VOLTAGE

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 scaleX = 42/60 X 20 = 14 V

SHUNT

BASICMETER UNIT

MULTEPILER

+

MAX. VALUE

MAX. SCALE

SCALE SHOWN

An Ameter

Voltmeter