Question

The primary coil of a transformer has 800 turns and the secondary coil has 8 turns. It is connected to a 220 volt a.c. supply. What will be the output voltage??

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Answer 1

Given :-

• Primary voltage = 220 volt

• No. of turns secondary turns = 8

• No. of primary turms = 800

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To find :-

• Secondary voltage.

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We know:-

`\boxed{ \rm(E_s)/(E_p)=(N_s)/(N_p)}`

where :-

• E_s = Secondary voltage

• E_p = primary voltage

• N_s = No. of turns secondary turns

• N_p = No. of primary turms

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So:-

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`\dashrightarrow\sf(E_s)/(E_p)=(N_s)/(N_p)`

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`\dashrightarrow\sf(E_s)/(220)=(8)/(800)`

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`\dashrightarrow\sf(E_s)/(220)=(8)/(8 * 100)`

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`\dashrightarrow\sf(E_s)/(220)=(\cancel8)/(\cancel8 * 100)`

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`\dashrightarrow\sf(E_s)/(220)=(1)/(100)`

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`\dashrightarrow\sf(E_s)/(1)=(220)/(100)`

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`\dashrightarrow\sf{E_s}=(220)/(100)`

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`\dashrightarrow\sf{E_s}=(22\cancel0)/(10\cancel0)`

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`\dashrightarrow\sf{E_s}=(22)/(10)`

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`\dashrightarrow\bf{E_s}=2.2 \: volt`