Please explain with all steps How do I know which charge is positive and which is negative - Physics - Electric Charges And Fields

Question

Please explain with all steps How do I know which charge is
positive and which is negative?

Abhijeet Kumar · Accepted Answer

Dear Student,
<img alt="" src=
"https://s3mn%20mnimgs%20com/img/shared/content_ck_images/ck_5f66f30bdd303%20jpg"
style="width: 768px; height: 1024px;">

Regards

Please explain with all steps. How do I know which charge is positive and which is negative?