Chapter 20 - Solutions
Electric Fields and Forces
Description: Electric forces and electric fields.
Learning Goal: To understand Coulomb's law, electric fields, and the connection between the electric
field and the electric force.
Coulomb's law gives the
Old Exams-Chapter 22
T081
Q3.Two identical charges each of charge Q are positioned at points A ( 5.0 m,
0.0 m) and B( -5.0 m, 0.0 m) to produce a net electric field of E = ( 10 j ) N/C at
point C ( 0.0 m, 5.0 m). Find the value of Q.( Ans: 39 nC)
Q4.The d
In Fig. ll-l-1. nro tinl'
conducting
balls of idenrical
massrl and idendcal charge
q hang from nonconducting
threadsof len_ohL. -\sume
that 0 is so smallthat tan 0 can
be replaced is approsimare
b-r
cqual.sin a (a) Shon'thar
=
SinE
nr
-t-\
L
\r-!
. r =/ l