the human eye and the colourful world — Science STD 10 — Question
Gujarat BoardEnglish MediumSTD 10Sciencethe human eye and the colourful world3 Marks
Question
Define potential difference. Mention its $S I$ unit and give its definition also.
✓
Answer
Amount of work done in moving a unit positive charge from one point to another point in an electric circuit carrying some current is called electric potential difference between those two points. → If $W$ amount of electrical work is done in moving $Q$ amount of positive charge between two points in an electric circuit carrying some current then by definition potential difference between those two points is given by : $ V=\frac{W}{Q} $ → SI unit of electric potential difference $ =\frac{\text { joule }(J)}{\operatorname{coulomb}(C)}=\text { volt }(V) $ → Above unit is named after Italian physicist, Alessandro Volta. ⇒ Definition of one volt : → When $1 J$ amount of electrical work is done in moving $1 C$ positive charge from one point to another point in an electric circuit carrying some current then electric potential difference between those two points is said to be $1 V$.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.