ELECTRIC CURRENT. EMF (ELECTROMOTIVE FORCE). PD(POTENTIAL DIFFERENCE).VOLTAGE RESISTANCE. OHM'S LAW Created by Omarov O. - презентация

1 ELECTRIC CURRENT. EMF (ELECTROMOTIVE FORCE). PD(POTENTIAL DIFFERENCE).VOLTAGE RESISTANCE. OHM'S LAW Created by Omarov O.

2 ELECTRIC CURRENT - DIRECTED MOTION OF ELECTRIC CHARGES Created by Omarov O. THE TWO CONDITIONS OF EXISTENCE : 1) THE EXISTENCE OF THE PHENOMENON OF FREE CHARGES 2) THE EXISTENCE OF ELECTRIC FIELD DIRECTION ELECTRIC CURRENT: FROM + TO – ELECTRIC CURRENT

3 Created by Omarov O. VOLTS IMPREGNATED WITH ACID copper zinc electrolyte Alessandro Volta

4 VOLTS IMPREGNATED WITH ACID Created by Omarov O.

5 EXPERIMENT ALESSANDRO VOLTA Al Cu V salt water Created by Omarov O.

6 THERMAL LIGHT CHEMICAL MAGNETIC EFFECTS OF AN ELECTRIC CURRENT Created by Omarov O.

7 x TERMAL AND LIGHT EFFECT OF AN ELECTRIC FIELD Created by Omarov O.

8 A CHEMICAL EFFECT OF AN ELECTRIC FIELD Created by Omarov O.

9 A CHEMICAL EFFECT OF AN ELECTRIC FIELD Created by Omarov O.

10 N S MAGNETIC EFFECT OF AN ELECTRIC FIELD Created by Omarov O. Wire is have not current

11 MAGNETIC EFFECT OF AN ELECTRIC FIELD Created by Omarov O. N S Wire is have current

12 ELECTRIC CURRENT - PHYSICAL QUANTITY IS EQUAL TO THE CHARGE THAT PASSES THROUGH THE CROSS-SECTION PER UNIT OF TIME Created by Omarov O. DESCRIPTION: I UNIT: 1A (AMP) THE FORMULA : METER: AMMETER ELECTRIC CURRENT q – charge (C); t – time(s); I – current(A)

13 MOVEMENT AND ELECTRONS IN THE ELECTRICAL CIRCUIT OF THE BATTERY AND A BULB takoe-elektricheskaya-cep-ponyatiya-obriv- cepi-i-korotkoe-zamikanie/ Created by Omarov O.

14 AMMETER INCLUDED SUCCESSIVELY Created by Omarov O.

15 Electric potential difference Analogy between gravitational and electrical potential energy: Created by Omarov O.

16 Electric potential difference Analogy between gravitational and electrical potential energy: Created by Omarov O.

17 THE ELECTRICAL POTENTIAL ENERGY OF A UNIT CHARGE AT A POINT IN A CIRCUIT IS CALLED THE POTENTIAL AT THAT POINT Created by Omarov O. DESCRIPTION: UNIT: 1V (VOLT) THE FORMULA : POTENTIAL

18 DIFFERENCE IN ELECTRIC POTENTIAL IS REPRESENTED BY THE SYMBOL Δ AND IS FORMALLY REFERRED TO AS THE ELECTRIC POTENTIAL DIFFERENCE Created by Omarov O. THE FORMULA : POTENTIAL DIFFERENCE UNIT: 1V (VOLT)

19 VOLTAGE, ALSO CALLED ELECTROMOTIVE FORCE, IS A QUANTITATIVE EXPRESSION OF THE POTENTIAL DIFFERENCE IN CHARGE BETWEEN TWO POINTS IN AN ELECTRICAL FIELD Created by Omarov O. THE FORMULA : UNIT: 1V (VOLT) POTENTIAL DIFFERENCE

20 VOLTAGE – A SCALAR PHYSICAL QUANTITY THAT IS EQUAL TO THE ELECTRIC FIELD ON THE MOVEMENT OF A SINGLE POSITIVE CHARGE Created by Omarov O. DESCRIPTION: U UNIT: 1V (VOLT) THE FORMULA : METER: VOLTMETER VOLTA GE q – charge (C); A – work (J); U – voltage (V)

21 VOLTMETER INCLUDED PARALLEL V Created by Omarov O.

22 RESISTANCE – SCALAR PHYSICAL QUANTITY THAT CHARACTERIZES THE PROPERTIES OF CONDUCTORS RESIST ELECTRICAL CURRENT Created by Omarov O. RESISTA NCE DESCRIPTION : R UNIT: 1 OHM (OHM) METER: OHMMETER THE FORMULA:

23 RESISTOR - DEVICE WITH CONSTANT RESISTANCE R Created by Omarov O.

24 RHEOSTAT - A DEVICE WITH VARIABLE RESISTANCE FOR REGULATING THE CURRENT AND VOLTAGE IN THE CIRCUIT. Created by Omarov O. RHEOSTAT

25 DEPENDENCE AMPERAGE VOLTAGE AND RESISTANCE ? R ? Created by Omarov O.

26 DEPENDENCE AMPERAGE VOLTAGE AND RESISTANCE Created by Omarov O. A R V

27 THE RELATIONSHIP BETWEEN VOLTAGE, CURRENT AND RESISTANCE IS GIVEN BY THE EQUATION: OHM'S LAW DEALS WITH THE RELATIONSHIP BETWEEN VOLTAGE AND CURRENT IN AN IDEAL CONDUCTOR. THIS RELATIONSHIP STATES THAT: OHM'S LAW Created by Omarov O. THE CURRENT FLOWING THROUGH A METALLIC CONDUCTOR HELD AT CONSTANT TEMPERATURE IS DIRECTLY PROPORTIONAL TO THE POTENTIAL DIFFERENCE(VOLTAGE) BETWEEN THE ENDS

28 I,A U,V CURRENT – POTENTIAL DIFFERENCE(VOLTAGE) GRAPHS Created by Omarov O.

29 OHM'S LAW CLEARLY Created by Omarov O.

30 TO BE CONTINUED… Created by Omarov O.