Transformer Equations (AQA GCSE Physics): Flashcards
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Practise the cards
12 cards from this deck
Transformer equation (coils to pd ratio)
Transformer equation (coils to pd ratio)
Power in 100% efficient transformer
Power in 100% efficient transformer
Power in each coil is the same
Power equation for 100% efficient transformer
Power equation for 100% efficient transformer
Power station generation voltage
Power station generation voltage
25,000 V
National Grid transmission voltage
National Grid transmission voltage
400,000 V
Factor of pd increase (25,000 V to 400,000 V)
Factor of pd increase (25,000 V to 400,000 V)
16
Current reduction factor when pd increases by 16
Current reduction factor when pd increases by 16
16
Relationship between power, pd, and current
Relationship between power, pd, and current
Heating effect reduction when current reduced by factor 16
Heating effect reduction when current reduced by factor 16
Factor of 256
Why heating effect reduced by 256 (not 16)
Why heating effect reduced by 256 (not 16)
Power depends on , so
Power loss formula with current squared
Power loss formula with current squared
Effect of reducing current on energy transfer efficiency
Effect of reducing current on energy transfer efficiency
More efficient (less energy dissipated as heat)