1.
A) A proton orbits a long charged wire, making 1.40*10^6revolutions per second. The radius of the orbit is 1.70 cm. What isthe wire's linear charge density?
B) A problem of practical interest is to make a beam of electronsturn a 90 degree corner. This can be done with the parallel-platecapacitor shown in the figure . An electron with kinetic energy2.40*10^-17 J moves up through a small hole in the bottom plate ofthe capacitor.What strength electric field is needed if theelectron is to emerge from an exit hole 1.0 cm away from theentrance hole, traveling at right angles to its originaldirection?What minimum separation d_min must the capacitor plateshave?
C) Your physics assignment is to figure out a way to useelectricity to launch a small 6.0-cm-long plastic drink stirrer.You decide that you'll charge the little plastic rod by rubbing itwith fur, then hold it near a long, charged wire. When you let go,the electric force of the wire on the plastic rod will shoot itaway. Suppose you can charge the plastic stirrer to 20.0 nC andthat the linear charge density of the long wire is 1.0*10^-7 C/m.What is the electric force on the plastic stirrer if the endclosest to the wire is 2.0 cm away?
1.
A) A proton orbits a long charged wire, making 1.40*10^6revolutions per second. The radius of the orbit is 1.70 cm. What isthe wire's linear charge density?
B) A problem of practical interest is to make a beam of electronsturn a 90 degree corner. This can be done with the parallel-platecapacitor shown in the figure . An electron with kinetic energy2.40*10^-17 J moves up through a small hole in the bottom plate ofthe capacitor.What strength electric field is needed if theelectron is to emerge from an exit hole 1.0 cm away from theentrance hole, traveling at right angles to its originaldirection?What minimum separation d_min must the capacitor plateshave?
C) Your physics assignment is to figure out a way to useelectricity to launch a small 6.0-cm-long plastic drink stirrer.You decide that you'll charge the little plastic rod by rubbing itwith fur, then hold it near a long, charged wire. When you let go,the electric force of the wire on the plastic rod will shoot itaway. Suppose you can charge the plastic stirrer to 20.0 nC andthat the linear charge density of the long wire is 1.0*10^-7 C/m.What is the electric force on the plastic stirrer if the endclosest to the wire is 2.0 cm away?
