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FORM 5
CHAPTER 3
ELECTROMAGNETISM
LEARNI NG AREA…
• 3.1 Analysing the Magnetic Effect of a
Current-carrying Conductor
• 3.2 Understanding the Force on a Cur...
3.1 Analysing t he Magnet ic
Ef f ect of a Current -carrying
Conduct or
• Learning Out comes…
– st at e what an elect roma...
Elect romagnet ism…
• I s a magnet made by winding coil of
insulat ed wire around a sof t iron
core, so t hat a magnet ic ...
Elect romagnet ism…
Elect romagnet ism…
• Straight Wire
Magnet ic Field Pat t ern &
Direct ion of t he Magnet ic Field
Due t o a Current …
• Straight Wire• Straig...
• Straight Wire
Magnet ic Field Pat t ern…
• Straight Wire• Straight Wire
• St raight Wire
– Two met hods t o det ermine d...
• Straight Wire
Magnet ic Field Pat t er n…
St raight Wire
• Straight Wire• Right -hand grip
rule
The thumb aligns
with th...
• Straight Wire• Straight Wire• Straight Wire
• Maxwell’s screw
rule
The direction of
rotation of the screw
gives the dire...
Magnet ic Field Pat t ern…St raight
Wire
Magnet ic Field Pat t ern…
St raight Wir e
Current out - anticlockwise Current in - clockwise
Magnet ic Field Pat t ern…
Circular coil
Magnet ic Field Pat t ern…
Circular coil
Magnet ic Field Pat t ern…
Solenoid
Magnet ic Field Pat t ern…
Solenoid
Magnet ic Field Pat t ern…
Solenoid
Methods to determine the poles of a solenoid:
Magnet ic Field Pat t ern…
Solenoid
Methods to determine the poles of a solenoid:
Fact or s Af f ect ing t he St rengt h of t he
Magnet ic Field of an Elect romagnet
Fact or s Af f ect ing t he St rengt h of t he
Magnet ic Field of an Elect romagnet
Fact or s Af f ect ing t he St r engt h of t he
Magnet ic Field of an Elect romagnet
Fact or s Af f ect ing t he St r engt h of t he
Magnet ic Field of an Elect romagnet
Fact or s Af f ect ing t he St r engt h of t he
Magnet ic Field of an Elect romagnet
Applicat ion of Elect romagnet
Applicat ion of Elect romagnet
• Time to answer the questions……
– Mastery Practice 3.1
– Challenge Yourself
• Page 78 & 79
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3.1 Physic Form 5 Electromagnetic

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3.1 Electromagnetic Physic Form 5 Chapter 3

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3.1 Physic Form 5 Electromagnetic

  1. 1. FORM 5 CHAPTER 3 ELECTROMAGNETISM
  2. 2. LEARNI NG AREA… • 3.1 Analysing the Magnetic Effect of a Current-carrying Conductor • 3.2 Understanding the Force on a Current- carrying Conductor in a Magnetic Field • 3.3 Analysing Electromagnatic Induction • 3.4 Analysing Transformers • 3.5 Understanding the Generation and Transmission of Electricity
  3. 3. 3.1 Analysing t he Magnet ic Ef f ect of a Current -carrying Conduct or • Learning Out comes… – st at e what an elect romagnet is. – draw t he magnet ic f ield pat t ern due t o a current in a: i. st raight wir e, ii. coil, iii. solenoid. – plan and conduct experiment s t o st udy f act ors t hat af f ect t he st rengt h of t he magnet ic f ield of an elect romagnet . – describe applicat ions of elect romagnet s.
  4. 4. Elect romagnet ism… • I s a magnet made by winding coil of insulat ed wire around a sof t iron core, so t hat a magnet ic f ield is produced when a current is passed t hrough t he coil. • Can be f ormed by winding about 20 t urns of insulat ed copper wire round a sof t -I ron core such as a sof t -iron nail.
  5. 5. Elect romagnet ism…
  6. 6. Elect romagnet ism…
  7. 7. • Straight Wire Magnet ic Field Pat t ern & Direct ion of t he Magnet ic Field Due t o a Current … • Straight Wire• Straight Wire • Det ermines by – Magnet ic Field in a St raight Wire – Magnet ic Field in a Coil – Magnet ic Field in a Solenoid
  8. 8. • Straight Wire Magnet ic Field Pat t ern… • Straight Wire• Straight Wire • St raight Wire – Two met hods t o det ermine direct ion of t he magnet ic t he f ield: • Right -hand gr ip r ule • Maxwell’s scr ew r ule
  9. 9. • Straight Wire Magnet ic Field Pat t er n… St raight Wire • Straight Wire• Right -hand grip rule The thumb aligns with the current flows while the fingers determine the magnetic field direction.
  10. 10. • Straight Wire• Straight Wire• Straight Wire • Maxwell’s screw rule The direction of rotation of the screw gives the direction of the magnetic field if the screw move forward in the direction of the current in the wire. Magnet ic Field Pat t ern… St raight Wir e
  11. 11. Magnet ic Field Pat t ern…St raight Wire
  12. 12. Magnet ic Field Pat t ern… St raight Wir e Current out - anticlockwise Current in - clockwise
  13. 13. Magnet ic Field Pat t ern… Circular coil
  14. 14. Magnet ic Field Pat t ern… Circular coil
  15. 15. Magnet ic Field Pat t ern… Solenoid
  16. 16. Magnet ic Field Pat t ern… Solenoid
  17. 17. Magnet ic Field Pat t ern… Solenoid Methods to determine the poles of a solenoid:
  18. 18. Magnet ic Field Pat t ern… Solenoid Methods to determine the poles of a solenoid:
  19. 19. Fact or s Af f ect ing t he St rengt h of t he Magnet ic Field of an Elect romagnet
  20. 20. Fact or s Af f ect ing t he St rengt h of t he Magnet ic Field of an Elect romagnet
  21. 21. Fact or s Af f ect ing t he St r engt h of t he Magnet ic Field of an Elect romagnet
  22. 22. Fact or s Af f ect ing t he St r engt h of t he Magnet ic Field of an Elect romagnet
  23. 23. Fact or s Af f ect ing t he St r engt h of t he Magnet ic Field of an Elect romagnet
  24. 24. Applicat ion of Elect romagnet
  25. 25. Applicat ion of Elect romagnet
  26. 26. • Time to answer the questions…… – Mastery Practice 3.1 – Challenge Yourself • Page 78 & 79
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3.1 Electromagnetic Physic Form 5 Chapter 3

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