Answer:
0.12959085 J
Explanation:
k = Coulomb constant =
q = Charge = 1.55 μC
d = Distance between charge = 0.5 m
Electric potential energy is given by
In this system with three charges which are equidistant from each other
The potential energy of the system is 0.12959085 J
Answer:
Explanation:
a)
Using Ohms Law
Where J is the current density
and the direction of E is the same as the direction of the current. Since J is uniform throughout the conductor just inside at a radius a (and anywhere else).
b)
Since we have no changing electric fields we can use Ampere’s law in it’s simplest form without displacement current
such that
and by the right hand rule, since the current is going to the right, the magnetic field is circling around the conductor such that it’s pointing out of the page at the top and into the page at the bottom.
c)
The Poynting vector is given by
and by the right hand rule it’s always pointing in towards the center of the conductor.
d)
Note: directions of these three vectors are mentioned along with their magnitudes in above 3 parts a , b and c