The transformer in another battery charger has a primary coil and a secondary coil. The voltage across the primary coil = 230V. The voltage across the secondary coil = 15V. The current in the secondary coil is 3.1 A. Calculate the current in the primary coil. Use the equation primary current = secondary voltage × secondary current / primary voltage

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The transformer in another battery charger has a primary coil and a secondary coil - Edexcel - GCSE Physics Combined Science - Question 4 - 2020 - Paper 1

Question 4

The transformer in another battery charger has a primary coil and a secondary coil. The voltage across the primary coil = 230V. The voltage across the secondary co... show full transcript

Worked Solution & Example Answer:The transformer in another battery charger has a primary coil and a secondary coil - Edexcel - GCSE Physics Combined Science - Question 4 - 2020 - Paper 1

Step 1

Calculate the current in the primary coil using the formula

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Answer

Given:

Secondary voltage (Vs) = 15 V
Secondary current (Is) = 3.1 A
Primary voltage (Vp) = 230 V

Using the formula:

I_p = \frac{V_s \times I_s}{V_p}

Substituting the values:

I_p = \frac{15 \times 3.1}{230}

Calculating:

I_p = \frac{46.5}{230} \approx 0.202 A

Thus, the current in the primary coil is approximately 0.202 A.

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