Ch.
17 Electric Potential Due
Friday 21 January

1. Imagine you
are standing on the edge of Death Valley, right at sea level. Death Valley is below
sea level and the surrounding hills are
above
sea level. We can define sea level as our zero of gravitational potential energy and our zero
of gravitational potential. What
arrangement
of charges would give you a region of high electric

potential, a region of
negative electric potential and a place between them where there was no electric potential, just
like in the gravitational analogy?

2. Estimate how many electron volts of
kinetic energy a typical car on
the
expressway has. How many Joules is this? Again be sure to state any assumptions
you use in making your estimation.

3. You and a close friend stand facing
each other. You are as close as you can get without actually
touching. If a wire is attached to each of you, you can act as the two
conductors in a capacitor. Estimate the capacitance of this "human
capacitor."

4. Are there any thoughts you wish to share, whether they are about this assignment, the reading (what seems impossible, what makes no sense, what you'd like to spend time on in class, what you really found interesting etc) or the course?