Electronics Batteries Practice Problems LabRat Scientific © 2018.

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Electronics Batteries Practice Problems LabRat Scientific © 2018

V What is the total voltage of the battery depicted below? These cells are connected in series, so the voltages are added: V = 6.0 V + 6.0 V + 6.0 V = 18.0 V

V What is the total voltage of the battery depicted below? These cells are connected in parallel, so the total voltage is simply the voltage of the individual cells: V = 12.0 V

V What is the total voltage of the battery depicted below? Parallel Cells, thus V = 3.0 V Series connection: V = 3.0 V + 3.0 V = 6.0 V 3.0 V V It’s not really smart to connect batteries like this… It’s just an example.

How long can the 4 Amp-Hour battery run the electric motor if the motor draws 20 amps? Battery Capacity 4.0 Amp-Hr Duration = ---------------------- = ---------------- = 0.2 Hr Current Draw 20 Amps 0.2 Hr = 12 min

Is this a good idea? No, batteries of different voltages should not be connected together.