Electromagnetic induction in transformers (Edexcel GCSE Physics Combined Science): Flashcards
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Electromagnetic induction definition
Electromagnetic induction definition
Changing magnetic field creates electricity in wire
What transformers use to change voltage
What transformers use to change voltage
Electromagnetic induction
How electromagnetic induction occurs
How electromagnetic induction occurs
Magnetic field & conductor move relative to each other
What electromagnetic induction creates
What electromagnetic induction creates
Potential difference (voltage)
One method to create electromagnetic induction
One method to create electromagnetic induction
Move a magnet near a coil of wire
Induced current's magnetic field action
Induced current's magnetic field action
Opposes the change that caused it
Three components of a transformer
Three components of a transformer
Primary coil, secondary coil, iron core
Iron core purpose in transformer
Iron core purpose in transformer
Links magnetic field, ensures efficient energy transfer
Step-up transformer coil feature
Step-up transformer coil feature
More turns in secondary coil
Step-down transformer coil feature
Step-down transformer coil feature
Fewer turns in secondary coil
Three ways to increase induced voltage
Three ways to increase induced voltage
Stronger field, move faster, more wire turns
Transformer efficiency reality
Transformer efficiency reality
Not 100% efficient; energy lost as heat
Why use step-up transformers in power lines
Why use step-up transformers in power lines
Efficient transmission over long distances