What is verb tense? how do you use verb tense? what is an example of verb tense?

Verb Tense is used to describe things that have either already happened, going to happen or happening now. So really described the present, past, and future.

Example Present: I go to school every day

Past: I used to play soccer

Future: I am going to get a Job at the zoo.

Verbs come in three tenses: past, present, and future. The past is used to describe things that have already happened, The present tense is used to describe things that are happening right now, or things that are continuous. The future tense describes things that have yet to happen

Explanation:

the direction of the magnetic field produced by an electric current will change when the direction of the electric current changes. for example : if a current is flowing in a straight length of wire, the magnetic field is described by a concentric circle (using right-hand rule).