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METERS by Mind Map: METERS

1. IT IS NOT CHARGE & IT IS CAUSED BY THE MOVEMENT OF CHARGE

2. MAGNETIC POLES

2.1. ELECTRIC CHARGES CAN BE ISOLATED MAGNETIC POLES

2.2. A REGION ON A MAGNET WHICH PRODUCES MAGNETIC FORCES

2.3. ALIGN THEMSELVES TO THE POLES OF THE EARTH

2.3.1. FUNDAMENTAL RULE : poles repel ; opposite poles attract

2.3.2. electric charges can be isolated. magnetic poles cannot

3. MAGNETIC FIELDS

3.1. THE SPACE AROUND A MAGNET IN WHICH A MAGNETIC FORCE IS EXERTED

3.2. MAGNETIC FIELD LINES

3.3. TESLA (T)

3.4. CAUSED BY MOTION OF ELECTRIC CHARGES

4. MAGNETISM

5. MAGNETIC DOMAINS

5.1. CLUSTERS OF ALIGNED ATOMS

5.2. FERROMAGNETIC

6. EARTH'S MAGNETIC FIELD

6.1. CURRENTS IN THE MOLTEN PART OF THE EARTH BENEATH THE CRUST CREATE THE EARTH'S MAGNETIC FIELD

6.2. EARTH'S MAGNETIC FIELD IS NOT STABLE

6.3. MAGNETIC POLE AND GEOPGRAPHIC POLE ARE OFFSET

6.3.1. MAGNETIC POLES ARE LOCATED

6.3.1.1. NORTH : HUDSON BAY REGION OF NORTHERN CANADA (1800 KM FROM GEOGRAPHIC POLE )

6.3.1.2. SOUTH : JUST SOUTH OF AUSTRALIA

6.4. MAGNETIC DECLINATION : DIFF BETWEEN GEOGRAPHIC AND MAGNETIC POLE

6.5. 1m YEARS AGO, THE FIELD COMPLETELY "SHUT OFF" FOR 10,000-20,000 YEARS

6.5.1. IT STRENGTH HAS DECREASED BY 5 % LATE 100 YEARS

7. ELECTRIC CURRENT

7.1. MOVEMENT OF ELECTRIC CHARGES

7.2. CURRENT PRODUCES A MAGNETIC FIELD

7.3. CURRENT IS CARRIED THROUGH A CONDUCTOR

7.4. MAGNETIC FIELD PRODUCES A PATTERN "CONCETRIC CIRCLES"

7.4.1. OERSTED'S PRINCIPLE; IF THE CURRENT SWITCHES DIRECTION, THE COMPASS NEEDLES WILL TURN 180o

8. ELECTROMAGNETS

8.1. IF A CURRENT CARRYING WIRE IS BENT INTO A LOOP

8.1.1. FIELD LINES

8.1.2. TWO OVERLOOPING LOOPS

8.2. CURRENTT CARRYING COIL OF WIRE WITH MANY LOOPS

8.2.1. THE STRONGEST ELECTRO MAGNETS USE SUPERCONDUCTORS AS A CORE

9. ELECTROMAGNETS APPLICATIONS

9.1. ALARM BELL

10. MOVING PARTICLES

10.1. MOVING CHARGED PARTICLE

10.1.1. PARALLEL TO THE MAGNETIC FIELD

10.1.2. NO DEFLECTION OCCURS

10.1.3. PERPENDICULAR TO MAGNETIC FIELD

10.1.3.1. MAXIMUM DEFLECTION

10.2. THE PARTICLES TRAPPED INSIDE THE WIRE ARE DEFLECTED

10.3. DEFLECTING FORCE ACTS IN THE OPPOSITE DIRECTION

10.4. APPLICATION USE :

10.4.1. TV'S, MRI'S , AURORA BOREALIS

11. MOTORS

11.1. USES PERMANENT MAGNET

11.1.1. WHERE ELECTRO MAGNET IS MADE TO ROTATE WHEN CONNECTED TO A BATTERY

11.1.2. SOUTH POLE WILL ALIGN WITH THE NORTH POLE OF THE PERMANENT MAGNET

11.1.2.1. COMMUTATOR

11.2. GALVANOMETER

11.2.1. DETECT ELECTRIC CURRENT

11.2.2. DETECTING EVEN VERY SMALL CURRENTS MAY BE CALIBRATED TO MEASURE CURRENT

11.2.2.1. AMMETER AND VOLTMETER