Question
(a) Define the term potential difference.
(b) How is potential difference related to work done and quantity of charge?
(b) How is potential difference related to work done and quantity of charge?
✓
Answer
(a) Potential difference : The amount of work done in moving a unit positive charge from one point to another point in an electric field is called potential difference.
(b) If $Q =$ Charge moving from one point to another in an electric field.
$W =$ Work done to move the charge Q from one point to another.
$V =$ Potential difference between two points.
Then work done in moving Q units of charge $= W$
Work done in moving one unit of charge = W/Q
But work done in moving one unit of charge $=$ Potential difference $= V$
$
\Rightarrow V=W / Q
$
(b) If $Q =$ Charge moving from one point to another in an electric field.
$W =$ Work done to move the charge Q from one point to another.
$V =$ Potential difference between two points.
Then work done in moving Q units of charge $= W$
Work done in moving one unit of charge = W/Q
But work done in moving one unit of charge $=$ Potential difference $= V$
$
\Rightarrow V=W / Q
$
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