Question

voltage are always measured between two points. why? with details

Answer 1

Answer:

Due to positive and negative charges present in electric current

Answer 2

Answer:

*sigh* Alright..

Explanation:

Let me clear up what the terms mean first,

Potential is the work done in bringing a positive test charge from infinity to a point within the electrical field.

Potential difference (voltage) is the work done in bringing a positive test charge from a point A to another point B within an electrical field. Its represented by V.

$v = w \div q$

where w= work, q=charge.

So suppose, you have two tanks.

Tank A has more water than Tank B. If these containers are connected by a pipe. Then, the water will flow from Tank A to Tank b, right?Therefore, Tank A has higher potential than Tank B.

The case with charges and current is similar, the more the potential difference (voltage) between two points, the more is the current.

Hope this helps.:)