**Paper 2 H - SAMPLE SET 1 Q6**

6)

**Figure 12**shows the construction of a simple transformer.6.1) Why is iron a suitable material for the core of a transformer? [1 mark]

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**one**box.A student makes three simple transformers,

**J**,**K**and**L**.

**Figure 13**shows how the potential difference across the secondary coil of each transformer varies as the potential difference across the primary coil of each transformer is changed.6.2) How can you tell that transformer J is a step-down transformer? [1 mark]

6.3) Each of the transformers has 50 turns on the primary coil.

Calculate the number of turns on the secondary coil of transformer L.

Use the correct equation from the Physics Equations Sheet. [3 marks]

6.3) Each of the transformers has 50 turns on the primary coil.

Calculate the number of turns on the secondary coil of transformer L.

Use the correct equation from the Physics Equations Sheet. [3 marks]

Number of turns on the secondary coil = _______________

**(Total for Question 6 = 5 marks)**