ELECTRODYNAMICS
Physical Science
Grade 12
Kimberly Fourie
, 1
INTRODUCTION
Into the page
Out of the page
Faradays law: the magnitude of the induced EMF is directly proportional to the rate of change of
the magnetic flux around the conductor.
Larger induced EMF:
• Use stronger magnets, therefore stronger magnetic field.
• Conductor is moved at right angles to the field.
• Increase the number of turns of coil.
Electromagnetic induction: the production of an induced EMF is due to a change in the magnetic
flux around the conductor.
Currents:
• Alternating current (AC) changes direction eg. generator/dynamo.
• Direct current (DC) has same direction eg. battery.
Advantages of AC:
• Easier to generate and transmit.
• Easier and cheaper to convert AC to DC than DC to AC if needed.
• AC motors produce higher power output.
• AC voltage easily changed with step-up/step-down transformers.
Kimberly Fourie
Physical Science
Grade 12
Kimberly Fourie
, 1
INTRODUCTION
Into the page
Out of the page
Faradays law: the magnitude of the induced EMF is directly proportional to the rate of change of
the magnetic flux around the conductor.
Larger induced EMF:
• Use stronger magnets, therefore stronger magnetic field.
• Conductor is moved at right angles to the field.
• Increase the number of turns of coil.
Electromagnetic induction: the production of an induced EMF is due to a change in the magnetic
flux around the conductor.
Currents:
• Alternating current (AC) changes direction eg. generator/dynamo.
• Direct current (DC) has same direction eg. battery.
Advantages of AC:
• Easier to generate and transmit.
• Easier and cheaper to convert AC to DC than DC to AC if needed.
• AC motors produce higher power output.
• AC voltage easily changed with step-up/step-down transformers.
Kimberly Fourie
