Consider two resistors R1=20ohm and R=80ohm in parallel across a drycell of voltage U=20V. a_ draw the given ciruit
b_ calculate R(eq)
c_calculate the current I of the drycell
d_calculate U(R1) and U(R2)
d_ determine the power P1 and P2
c_ determine the electric energy E1 and E2 during the functioning time t=2h​

To understand the behavior of the electric field at the surface of a conductor, and its relationship to surface charge on the conductor. a conductor is placed in an external electrostatic field. the external field is uniform before the conductor is placed within it. the conductor is completely isolated from any source of current or charge. part a: which of the following describes the electric field inside this conductor? it is in the same direction as the original external field.it is in the opposite direction from that of the original external field.it has a direction determined entirely by the charge on its surface.it is always zero. part b: the charge density inside the conductor is: 0non-zero; but uniformnon-zero; non-uniforminfinite part c: assume that at some point just outside the surface of the conductor, the electric field has magnitude e and is directed toward the surface of the conductor. what is the charge density η on the surface of the conductor at that point? express your answer in terms of e and ϵ0

The force needed to overcome static friction is usually less than that needed to overcome kinetic friction.true or false?

What is the technical name for super glue type adhesives?