Q14 of 330 Page 5

State the relation between potential difference, work done and charge moved.

Electric potential difference is known as voltage, which is equal to the work done per unit charge to move the charge between two points against static electric field.


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12

Which of the following are conductors and which are insulators?

Sulphur, Silver, Copper, Cotton, Aluminium, Air, Nichrome, Graphite, Paper, Porcelain, Mercury, Mica, Bakelite, Polythene, Manganin.

 13

What do you understand by the term “electric potential”? (or potential) at a point? What is the unit of electric potential?

 14

Calculate the work done in moving a charge of 4 coulombs from a point at 220 volts to another point at 230 volts.

 15

Name a device that helps to measure that potential difference across a conductor.