A transformer is to be used to provide power for a computer disk drive that needs 6.4 V (rms) instead of the 120 V (rms) from the wall outlet. The number of turns in the primary is 300, and it delivers 500 mA (the secondary current) at an output voltage of 6.4 V (rms). (a) Should the transformer have more turns in the secondary compared to the primary, or fewer turns

The secondary coil should have fewer turns compared to the primary coil.

Explanation:

= Number of turns in primary coil = 300

= Number of turns in secondary

= Voltage in primary coil = 120 V

= Voltage in secondary coil = 6.4 V

We have the relation

The secondary coil has 16 turns which is less than the turns in the primary coil.

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