Answer:
Explanation:
Coulomb's law states that the force of attraction or repulsion between any two charges is proportional to the product of the magnitude of charges and inversely proportional to the square of the distance between the charges
⇒[tex]F\alpha\frac{q1*q2}{r^{2}}[/tex]
∴[tex]F=k\frac{q1*q2}{r^{2}}[/tex]
where [tex]F[/tex] is the force of attraction or repulsion
[tex]k[/tex] is Coulumb's constant=[tex]9*10^{9}Nm^{2}C^{-2}[/tex]
[tex]q1[/tex] and [tex]q2[/tex] are the magnitude of the charges
[tex]r[/tex] is the distance between two charges
The force between the two charges is attractive if they are of different polarity
The force between the two charges is repulsive if they are of same polarity
Question 7:
Given: [tex]F=1.9*10^{-29}N[/tex], [tex]q1=q2=1.6*10^{-19}C[/tex]
By coulomb's law,
[tex]1.9*10^{-29}=9*10^{9}*\frac{1.6*10^{-19}*1.6*10^{-19}}{r^{2}}[/tex]
⇒[tex]r=3.5m[/tex]
Question 6:
Given: [tex]q1=q2=-1.5*10^{-6}C[/tex], [tex]r=0.28m[/tex]
By coulomb's law,
[tex]F=9*10^{9}*\frac{1.5*10^{-6}*1.5*10^{-6}}{0.28^{2}}[/tex]
⇒[tex]F=0.26N[/tex]
