test charge उदाहरण वाक्य
उदाहरण वाक्य
- where \ vec \ mathcal { R _ i } = \ vec r-\ vec r _ i is the distance of each charge Q _ i from the test charge q, which situated at the point \ vec r, and \ phi ( \ vec r ) is the electric potential that would be at \ vec r if the test charge were not present.