Question: Wall current has an rms value of E 1 = 1 2 0 V . We pass it through a transformer in order to obtain

Wall current has an rms value of E1=120V. We pass it through a transformer in order to obtain E2. Suppose we want for E=5V to power a microcontroller board(the board can withstand input voltages from 5V to 9 V but we prefer to be close to 5V). And suppose N1=1000 turns. What should N2 be?

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