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Chapter 9 Section 9.1 Series & Parallel Circuits
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Terms in this set (17)
What do we call a circuit that has only one path?
Series circuit.
What happens to the current in a series circuit when a switch is opened?
When a switch is opened, all the electrons are blocked and the current stops.
How does the total voltage lost on all loads compare to the total voltage supplied by the battery?
The sum of the voltages lost on the loads equals the total voltage supplied by the battery.
Why is the current at any two locations in a series circuit always the same?
Since there is only one path for the electrons to travel in the series circuit, the current in each part of a series circuit is equal.
If a resistor is added in series to an existing resistor, what happens to the total resistance?
If a resistor is added in series to an existing resistor, you increase the total resistance, and therefore the total current throughout the circuit decreases.
What name is given to a circuit that contains more than one pathway?
Parallel Circuit.
Two loads are connected in parallel. Compare the voltage across each load.
Loads in parallel have the same voltage.
Two loads connected in parallel. Must the current through one load equal the current through the other load?
No the current would not be equal.
What name is given to a location in a circuit where the circuit branches into more pathways or where pathways rejoin?
Junction Point.
How does the current entering the junction point compare to current leaving that same junction point?
The current entering the junction point must be equal to the sum of the current exiting the junction point.
If you add a resistor in parallel to an existing resistor, what happens to the total resistance in the circuit?
The total resistance of the circuit will decrease, so the total current leaving the battery would have to increase.
How is a parallel circuit different from a series circuit?
Series Circuit - only one path for current to travel
Parallel Circuit - more then one path for current to travel
In a series circuit, how does the voltage supplied by the battery compare to the voltages on each load?
The sum of the voltages lost on the loads equals the total voltage supplied by the battery.
What happens to the total resistance of a series circuit when another resistor is added?
The total resistance increases.
What happens to the total resistance of a parallel circuit when another resistor is added?
The total resistance decreases.
Two resistors are connected in parallel to a battery. What must be the voltage across these two resistors?
Both resistors will have the same voltage of the battery.
Is the current in one branch of a parallel circuit more than, less than, or equal to the total current entering the junction point of the
circuit?
The current in one branch of a parallel circuit is less than the total current entering the junction point of the circuit.
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