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23 Nov 2019
A transformer is to be used to provide power for a computer diskdrive that needs 5.4 V (rms) instead of the 120 V (rms) from thewall outlet. The number of turns in the primary is 420, and itdelivers 500 mA (the secondary current) at an output voltage of 5.4V (rms).
(a) Should the transformer have more turns in the secondarycompared to the primary, or fewer turns?
There should be more turns in the secondary.
There should be fewer turns in the secondary.
(b) Find the current in the primary.
______ mA
(c) Find the number of turns in the secondary.
________ turns
A transformer is to be used to provide power for a computer diskdrive that needs 5.4 V (rms) instead of the 120 V (rms) from thewall outlet. The number of turns in the primary is 420, and itdelivers 500 mA (the secondary current) at an output voltage of 5.4V (rms).
(a) Should the transformer have more turns in the secondarycompared to the primary, or fewer turns?
There should be more turns in the secondary.
There should be fewer turns in the secondary.
(b) Find the current in the primary.
______ mA
(c) Find the number of turns in the secondary.
________ turns
Nestor RutherfordLv2
15 Jun 2019
