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When a conducting wire is connected to battery a p.d is created between the ends of the conducter which sets up an electric field throughout the conductor.
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Batteries is an energy source that is used for devices. It basically converts chemical energy into electrical energy. They are made of one or more cells which consists of an electrolyte.When a device is connected to its terminals it gives energy to the device so that it works.Batteries are now common in every household many devices need batteries like : wireless mouse, clocks, lasers and phones etc..................
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