You create a transformer by wrapping wire around an iron nail. the number of turns are: primary (500); secondary (2500). the primary voltage is 3.00 v. the secondary current is 200 ma. this is like examples #14 and #15 (pages 16 & 17) of chapter 21 notes. 13) calculate the secondary voltage (v). 14) calculate the primary current (a).

To protect all four receptacles on a branch circuit that surrounds a swimming pool, you would install which of the following configurations? a. gfci feed-through receptacle at the end of the load's circuit b. gfci-terminated receptacle at the beginning of the load's circuit c. gfci feed-through receptacle at the beginning of the load's circuit and the other receptacles connected to the load side of that receptacle d. gfci-terminated receptacle at each end of the load's circuit

Blank liquids and gases exert a buoyant force on objects placed in them

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire