Question
A transformer is used to convert $120 \mathrm{V}$ to $9.0 \mathrm{V}$ for use in a portable CD player. If the primary, which is connected to the outlet, has 640 turns, how many turns does the secondary have?
Step 1
This can be written as: \[ \frac{V_1}{V_2} = \frac{N_1}{N_2} \] Show more…
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