5 wires meet at a junction.  I1 (current 1) and I2 (current…

5 wires meet at a junction.  I1 (current 1) and I2 (current 2) are going into the junction.   I3 (current 3), I4 (current 4) and I5 (current 5) are coming out of the junction.  a) Using Kirchhoff’s first rule, write the current equation. (1 point)b) If I1 = 1.46 A, I2 = 3.25 A, I3 = 1.71 A, I4 = 2.1 A, what is the value of I5? (2 points).

Dielectrics: A parallel-plate capacitor has a capacitance of…

Dielectrics: A parallel-plate capacitor has a capacitance of 10 mF and is charged with a 20 V power supply. The power supply is then removed and a dielectric material of dielectric constant 4.0 is used to fill the space between the plates. What is the voltage now across the capacitor?