Electricity

• Electric potential: The Electric potential of a point in an electric field is defined as the work to be done to move a unit positive charge from infinity to that point.
• Potential difference: The potential difference between two separate points is defined as the work done to move a unit positive charge from one point to another.

• The bulb will glow or the magnetic needle will show deflection if the liquid in the beaker is a good conductor of electricity.
• Greater the deflection of needle or brighter the light, better is the conductivity of the liquid.

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