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Clarify how a simple iron-cored transformer operates based on its principles.

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Cambridge IGCSE PhysicsElectricity and magnetismSupplement content

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Clarify how a simple iron-cored transformer operates based on its principles

This point belongs to The transformer, especially The transformer outcomes.
You need to be able to clarify how a simple iron-cored transformer operates based on its principles.
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Paper 4 structured question: The transformer

Paper 4Theory (Extended)1 marks

Description

Transformer Operation

A transformer consists of two coils of wire, the primary and secondary, wound around an iron core. When an alternating current flows through the primary coil, it generates a changing magnetic field that induces a voltage in the secondary coil.

a
State the principle that allows a transformer to operate.
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Related learning objectives

Explain how a basic transformer is built, highlighting the use of a soft-iron core for changing voltage levels.
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Identify and define the roles of primary and secondary coils, as well as the concepts of step-up and step-down transformers.
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Recall and apply the formula Vp/Np = Vs/Ns, where V and N represent voltage and number of turns for primary and secondary coils respectively.
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Discuss how transformers are utilized in the high-voltage transmission of electrical energy.
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List the benefits associated with transmitting electricity at high voltages.
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