Chapter 9.4 Flashcards
What is a circuit that contains a complete path for electrons to flow?
Closed circuit
What are the three parts of a simple electric circuit?
Battery, Conductors, Load
What is a device that opens or closes a circuit?
Switch
What is a circuit that has a gap through which electrons cannot flow?
Open circuit
What occurs if electricity has the opportunity to take a “shortcut” through a circuit and avoid the load?
Short circuit
What is the formula for Ohm’s law that allows us to find the current flowing through a circuit?
I=V/R
What is a device that transforms the energy of the electric current into another useful form of energy?
Load
What is a device that uses a narrow strip of metal in a protective, insulated case to protect from the increased current from a short circuit?
Fuse
What is an automatic switch that opens the circuit when current flowing through it exceeds a pre-determined amount?
Circuit breaker
How can the total resistance be calculated in a series circuit?
The total resistance of a series circuit equals the sum of the resistances of the individual loads (Rt = R1+R2+R3…)
What type of circuit utilizes loads arranged in separate branches of the circuit with the current divided among them?
Parallel circuit
How can the total resistance be calculated in a parallel circuit?
The reciprocal of the total resistance of a parallel circuit equals the sum of the reciprocal of the resistances of the individual loads.
What happens to the total resistance of a parallel circuit if more loads are added?
The total resistance will be reduced.
How is the total voltage of a parallel circuit related to the voltage of the individual loads?
The voltage of each branch MUST be the same as the whole circuit.
What happens to the current flowing through a parallel circuit as more loads are added?
The current increases because the total current is the sum of the current through each bulb.
