Question

If the average current passing through the secondary coil of the transformer with 40 turns and...

If the average current passing through the secondary coil of the transformer with 40 turns and a secondary voltage of 24-V AC is 10 A, what average current is passing through the primary coil that makes 200 turns and has a primary voltage of 120-V AC?

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Answer #1

given
Ns = 40 turns
Vs = 24 V
Is = 10 A
Np = 200 turns
Vp = 120 V
Ip = ?

use, Power supplied to primary coil = power output from secondary coil

Ip*Vp = Is*Vs

Ip = Is*Vs/Vp

= 10*24/120

= 2 A

Note: P stands for primary and S stands fro secondary.

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