The battery charger for an MP3 player contains a step-down transformer with a turns ratio of 1:38, so that the voltage of 114.5 V available at a wall socket can be used to charge the battery pack or operate the player. What voltage does the secondary coil of the transformer provide
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Ответ:
You should try to minimize guesswork
2. C
Remaining time should be used to revise answers
3. C
Citing another person's work is allowed as long as full credit is given to the person and the citation is proper.
4. C
A cheater may never be caught but they will know they had to rely on others to complete the task or test.