Answer:
Two positive charge will produce force of of 0.23 N and negative sign shows that the force between charges is attractive.
Step-by-step explanation:
Given that,
Net charge on a glass rod,
![q_1=0.748\ \mu C=0.748* 10^(-6)\ C](https://img.qammunity.org/2021/formulas/physics/high-school/fpbur60o36phgkdbgrndss5ga9o9gxoa41.png)
Net charge on a silk cloth,
![q_1=-0.502\ \mu C=-0.502* 10^(-6)\ C](https://img.qammunity.org/2021/formulas/physics/high-school/qzpq6uphl0hh8p96y3rnl5nd2rtnuly8zf.png)
Separation between charges, d = 12 cm = 0.12 m
To find,
The magnitude of the attractive force between the two charged objects.
Solution,
If F is the electric force between two charges. It is given by the electrostatic force of attraction. It is given by :
![F=(kq_1q_2)/(d^2)](https://img.qammunity.org/2021/formulas/physics/high-school/tw6ewqgk791t6m3y4p7e8z7y7hmnqjn70e.png)
![F=(9* 10^9* 0.748* 10^(-6)* -0.502* 10^(-6))/((0.12)^2)](https://img.qammunity.org/2021/formulas/physics/high-school/f3k0f9udyf9zk37mzcwq4fvqrb71up4gdu.png)
![F=-0.23 N](https://img.qammunity.org/2021/formulas/physics/high-school/9nr40fz1lunzamagdloukmvcb808app45n.png)
So, two positive charge will produce force of of 0.23 N and negative sign shows that the force between charges is attractive.