If you plug a 9.0 V battery into a transformer with a primary coil of 54 loops and a secondary coil of 45 loops, what will be the resulting p.d. in the secondary coil? Group of answer choices 11 V 4.5 V 7.5 V 12 VIf the secondary coil in a transformer has 40 turns, and the primary coil with 20 turns is charged with a p.d. 50 V, then the p.d. in the secondary coil would be _(blank)_. Group of answer choices 60 V 25 V 100 V 50 VIf the secondary coil in a transformer has 40 turns, and the primary coil with 20 turns is charged with a p.d. 50 V, then the p.d. in the secondary coil would be _(blank)_. Group of answer choices 60 V 25 V 100 V 50 V