1.5-V battery stores 5.0 kJ of energy. How long can it light a flashlight bulb that draws 0.60 A?
Four wires meet at a junction. The first carries 4.0 A into the junction, the second carries 5.0 A out of junciton, and the third carries 2.0 A out of junction. (a) How much current does the fourth wire carry? (b) Which direction (into or out of the junction)?
Four 20-Ohm resistors are connected in series and the combination is connected to a 20-Vemf device. What is the current in any one of the resistors?