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Question

In a step-up transformer, the relation between the number of turns in primary NP and the number of turns in secondary NS coils is


A

NS is greater than NP

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B

NP is greater than NS

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C

NS is equal to NP

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D

NP=2NS

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Solution

The correct option is A

NS is greater than NP


Explanation for the correct option:

Option A:

  1. In a step-up transformer, the secondary voltage is greater than the primary voltage.
  2. Hence, the number of turns in the primary coil will be lesser than the number of turns in the secondary coil.
  3. That is, NS is greater than NP

Option A is correct

Explanation for the incorrect option:

Option B:

Since NS is greater than NP, NP cannot be greater than NS

Option B is incorrect

Option C:

Since NS is greater than NP, NP cannot be equal to NS

Option C is incorrect

Option D:

Since NS is greater than NP, NP cannot be equal to 2NS

Option D is incorrect

Therefore, Option A is correct.


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