Question

A transformer in a neon sign contains 20 truns in the primary coil and 80 truns in the secondary coil. Which is greater- the output voltage or the input voltage?​

Answer 1

Answer:

The output voltage is greater.

Explanation:

The turns ratio is directly proportional.  Vs=  Vp X (ns/np)

In this neon sign xformer example it is 80/20  or 4

So secondary voltage for 120 volt primary/line voltage = 480 volt secondary volts.

This is practical in a neon sign as it takes more voltage to start the neon gas excitation.

Answer 2

The output voltage is greater.

Calculation of output voltage:

Since A transformer in a neon sign contains 20 turns in the primary coil and 80 turns in the secondary coil.

So here turns ratio should be directly proportional.  Vs=  Vp X (ns/np)

So, In this neon sign former example it is 80/20  or 4

Thus,  secondary voltage for 120 volt primary/line voltage = 480 volt secondary volts.

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