IB Physics Sub-topic D4 Definitions

This page contains our IB Physics definitions for sub-topic D4. By learning each one of these definitions, you will fully cover the content for IB Physics 'Induction'.
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AC generator

It is a device that produces an alternating current

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Electromotive force

The total energy difference per unit charge, or rate of change of flux

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Flux density

It is the flux per area, or magnetic field strength

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Forward-bias

It is the forward flow of current due to negligible resistance in a diode

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Ideal diode

It is a device that allows current to flow in the forward direction due to negligible resistance, but not the backward direction due to infinite resistance

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Non-ideal transformer

It is a transformer that has internal power losses

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Rectification

It is the conversion of AC to DC

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Reverse bias

It is the inhibition of reverse flow due to infinite resistance in a diode

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Root mean square current

It is the sub-maximum current from a AC generator

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Root mean square voltage

It is the sub-maximum voltage from a AC generator

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Smoothing

It is the conversion of a pulsating DC to a stable potential difference

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Step-down transformer

It is a transformer that decreases the output voltage

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Step-up transformer

It is a transformer that increases the input voltage

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Total flux linkage

It is the amount of flux passing through all turns of a coil

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Transformer

It is a device that takes an alternating voltage input and produces an alternating voltage output via electromagnetic fields

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