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​

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c