A very thin glass rod 4 m long is rubbed all over with a silk cloth (see figure below). It gains a uniformly distributed charge +4.5 × 10 – 6 C. Two small spherical rubber balloons of radius 1.2 cm are rubbed all over with wool. They each gain a uniformly distributed charge of -9.3 × 10 – 8 C. The balloons are near the midpoint of the glass rod, with their centers 3 cm from the rod. The balloons are 2 cm apart (4.4 cm between centers).
(a) Find the magnitude of the electric field at the location marked by the ×, 0.6 cm to the right of the center of the left balloon.
43300000
Also calculate the angle the electric field makes with the horizontal. (Take the horizontal to be the +x axis pointing to the right.)
89.2 o counterclockwise from the + x axis
(b) Next, a neutral hydrogen atom is placed at that same location (marked by the ×). Draw a diagram showing the effect on the hydrogen atom while it is at that location.
The polarizability of atomic hydrogen has been measured to be? = 7.4 × 10 ?41 C · m/(N/C). What is the distance between the center of the proton and the center of the electron cloud in the hydrogen atom?
5.78e-15m
