find the position of q such that the charges will be in equilibrium q is the third charge.also find the value of q where q1= 16 micro columb and q2 = 4 micro columb and r = 90 cm
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Answer:Let the charge q be placed at 0 so that its distance from charge at A=x and from charge B=r−x.
Now, the system is in equilibrium, if electrostatic force on q due to charge at A= electrostatic force on q due to charge at B ie,
4πε
0
1
x
2
=
4πε
0
1
(r−x)
2
(r−x)
2
=x
2
or x=
2
r
Three charges will be in equilibrium if net force on each charge is zero i.e,
4πε
0
1
(
2
r
)
2
+
4πε
0
1
r
2
Q−Q
=0
or, q=
4
−Q
Explanation:
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