Final answer:
To increase the voltage from 6V to 16V, approximately 168 turns should be in the secondary coil.
Step-by-step explanation:
To calculate the number of turns in the secondary coil, you can use the formula:
Voltage ratio = Number of turns in secondary coil / Number of turns in primary coil
Given that the voltage ratio is 16 V / 6 V = 2.67 and the number of turns in the primary coil is 63, we can calculate the number of turns in the secondary coil:
Number of turns in secondary coil = Voltage ratio * Number of turns in primary coil = 2.67 * 63 = 168.21
Therefore, there should be approximately 168 turns in the secondary coil.