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There are 8000 turns on the primary coil and 200 turns on the secondary coil of the transformer. The primary coil is connectd to a 240 v mains supply, suggest whether this transformer is a step up or step down transformer

Sagot :

Answer: Step down

Explanation:

Given

No of turns on the primary coil is [tex]N_p=8000[/tex]

No of turns on the secondary coil is [tex]N_s=200[/tex]

Primary is connected to the voltage [tex]V_p=240\ V[/tex]

According to the turns rule

[tex]\Rightarrow \dfrac{N_p}{N_s}=\dfrac{V_p}{V_s}\\\\\Rightarrow \dfrac{8000}{200}=\dfrac{240}{V_s}\\\\\Rightarrow V_s=\dfrac{240}{40}\\\\\Rightarrow V_s=6\ V[/tex]

As the voltage drops from 240 V to 6 V. Therefore it is a step-down transformer.

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