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2 cards from this section. Quick, good the night before a test.
What happens to the total voltage when cells are connected in series?
Think about how batteries in a flashlight work.
Are the internal resistances of cells in series added or subtracted?
Consider how resistance behaves in a series circuit.
What is the total emf in a series configuration with two cells, one of 4V and another of 6V?
Remember to add the voltages together.
True or False: The current in a parallel circuit is the same through all components.
Think about how current splits in a parallel connection.
You have three 12V batteries in series with internal resistances of 1Ω each, connected to a 5Ω load. What is the total voltage across the load and what current flows?
Don’t forget to add the internal resistances when calculating total resistance.
In a parallel arrangement, you connect a 9V battery with a 2Ω internal resistance and two identical batteries with 3Ω each. What is the equivalent internal resistance?
Remember to use the formula for parallel resistances.
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