# Exe! How Practice Journal Entries: (prepare these entries on the following page): Try not to look...

##### An electromagnet consists of an iron core with an air gap as shown below. The core...
An electromagnet consists of an iron core with an air gap as shown below. The core is square shaped with a side length of and has a relative permeability of and a cross-sectional area of A. The air gap has a length of , and = ( - )/2. The coil has N turns. Derive a formula for the magnitude of th...
##### 2. Let Val-6V, V2 -3V, RI-22, R-22, R3-22. What is the contribution of voltage source Vsl...
2. Let Val-6V, V2 -3V, RI-22, R-22, R3-22. What is the contribution of voltage source Vsl and the voltage source Is to the current labeled Ix? Solution R I R R2 S1...