(1) What are the differences between electric insulators and conductors? (2) The
ID: 1705986 • Letter: #
Question
(1) What are the differences between electric insulators and conductors?(2) The electric field between two large conducting plates is uniform, 100kN/C, pointing from plate A to plate B. If the two plates are separated by 5cm, what is the potential difference between these two plates? Which plate has a higher electric potential?
(3) There is a spherical conductor with a total charge +Q, and a radius of R, illustrate:(a) Charge distribution;(b) electric field lines;(c) equi-potential lines(surfaces).
Explanation / Answer
1. insulator: there are no free electrons. conductor: there are free electrons. 2. its 100e3*5e-2=5e4(V). the positive plate( the plate which the field go from). 3. a) its on the surface only, uniformly distributed. b) straight lines from the center, and distributed uniformly. c) start from R=R0 (radius of the surface). its many spherical surfaces that share the same center with the conductor.
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