Atransformer is to be used to provide power for a computer disk drive that needs 6.0 v (rms) instead of the 120 v (rms) from the wall outlet. the number of turns in the primary is 400, and it delivers 500 ma (the secondary current) at an output voltage of 6.0 v (rms). find the number of turns in the secondary.

=20 turns

Explanation:

The given case is a step down transformer as we need to reduce 120 V to 6 V.

number of turns on primary coil N_{P}= 400

current delivered by  secondary coil  I_{S}= 500 mA

output voltage = 6 V (rms)

we know that

putting values we get

to calculate number of turns in secondary

therefore, =20 turns

mass and volume are the answers you are looking for