Quiz
1. An electron ( C) leaves the cathode of a cathode ray tube (CRT) and travels in a uniform electrostatic field toward the anode, which is at a potential V with respect to the cathode. What is the work W done by the electrostatic field involved in moving the electron from the cathode to the anode?
, kJ
, J
2. In Problem #1, what is the electric field strength if the distance between the cathode and the anode is 10 cm?
, V/m
, kV/m
3. The electrostatic potential due to a point charge at a distance cm away from it is V. What is the potential of a charge at a distance cm from it?
, V
4. The electrostatic potential due to a dipole , at a distance cm away from it along the z-axis, is V. What is the potential of a dipole at a distance cm from it along the z-axis?
5. The electrostatic potential
where x is measured in meters and is the permittivity of vacuum, exists in a region of space (vacuum) in the shape of a parallelogram of size cm. What is the electrostatic energy stored in this region?