Question

How to find potential difference in electric field?

Answer 1

Hello dear user ......
Answer here ..

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The difference in electric potential between two points is known as potential difference .

S.I unit = volt denoted by v.

It's formula is
V=w/Q

Where ,

W = work done

And Q = charge moved

The potential difference between two points is said to be 1 volt if 1 Joule of work is done in moving 1 coulomb of elections charge from one point to the other .

Thus ,
1 volt = 1 Joule/ 1 Coulomb

Or

1 v = 1 j / 1 C

Potential difference is measured by voltmeter .


One example =

Q .How much work is done in moving a charge of 2 coulombs from a point at 118 volts to a point at 128 volts ??

Solution =====

we know that :

V=w/Q

here ,
potencial difference v=128 - 118
=10 volts

work done , w = ??

charge moved , Q = 2 coulombs

putting these values in the above formula , we get :

10 = w / 2

or

w = 10 × 2

Thus , work done , w = 20 joules .

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Hope it's helps you.