Question 2 4 pts Your cellular phone charges off of a 5-Volt DC source, like a USB port. To plug your phone into the wall, you need a transformer that steps down the voltage from 120 VAC to something smaller, and then need some other techniques to convert that AC voltage to DC. Let's assume the transformer steps the voltage down from 120 VAC to 6 VAC (both RMS voltages), and has 100 turns in the primary coil. How many turns must the secondary coil have? (Note: this is not actually how most power supplies work nowadays - they are usually switched- mode power supplies [3, and use a more efficient and compact technique for creating the desired DC voltage}. 05 012 0100 Q 1200 O 2000