GCSE Physics – National grid – Transformer equation

Last updated: 27/05/2020
Edexcel GCSE Science – Combined science foundation Electromagnetic induction GCSE Physics – National grid – Transformer equation

Learning Objectives

-I can recall the units needed for Vp_p / Vs_s = np_p / ns_s
-I can rearrange Vp_p / Vs_s = np_p / ns_s
-I can use Vp_p / Vs_s = np_p / ns_s

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  1. Current
  2. Review
  3. Answered

  1. What is the potential difference vs turns equation?

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  2. What are Vp_p and Vs_s measured in?

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  3. What is Vp_p in the voltage vs turns equation?

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  4. What is ns_s in the voltage vs turns equation?

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  5. The ratio of potential differences on transformer coils matches what?

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  6. In a step-up transformer, what is the relationship between Vs_s and Vp_p?

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  7. In a step-down transformer, what is the relationship between Vs_s and Vp_p?

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  8. A 230 V transformer has 11,500 turns on its primary coil and 600 on its secondary coil. What is the output voltage?

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  9. A primary transformer has a voltage of 240 V and a primary coil with 500 turns. What is the voltage in the secondary coil if it has 25 turns?

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  10. A transformer has an input voltage 240 V and output voltage of 12 V. If the primary coil has 5,000 turns, how many turns does the secondary coil have?

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  11. A 230 V transformer has 11,500 turns on its primary coil and 14,000 on its secondary coil. What is the output voltage?

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  12. A 230 V transformer has 10,000 turns on its primary coil and the output voltage is 23 V. How many turns are on the secondary coil?

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