Kirchhoff's Laws & Resistors Flashcards
🡪 Any component or device in a circuit that
transforms electric potential energy into some
other form of energy, causing an electric
potential drop, is called a …
load
law of conservation of energy
As electrons move through an electric circuit
they gain energy in sources and lose energy in
loads, but the total energy gained in one trip
through a circuit is equal to the total energy
lost.
Electric charge is neither created nor lost in
an electric circuit, nor does it _________ at
any point in the circuit.
accumulate
Kirchhoff’s Voltage Law (KVL)
Around any complete path through an electric
circuit, the sum of the increases in electric
potential is equal to the sum of the decreases
Voltage formula
(in a series circuit)
Vtotal = V1 + V2 + V3 + … + Vn
(in a series circuit)
Voltage formula
(in a parallel circuit)
Vtotal = V1 = V2 = V3 = … = Vn
Kirchhoff’s Current Law (KCL)
At any junction point in an electric circuit, the
total electric current into the junction is equal
to the total electric current out.
current formula
(series circuit)
Itotal = I1 = I2 = I3 =…= In
(in a series circuit)
current formula
(parallel circuit)
Itotal = I1 + I2 + I3 +…+ In
(in a parallel circuit)
When charges pass through a material or
device, they experience an opposition or
___________ to their flow.
resistance
_______ is the number of
electrons moving in the same direction
past a certain point in one second.
Current
Increasing the resistance in a circuit
__________ the current that flows.
decreases
The more current you
have (the more coulombs per second going
past a point), the ________ the electrical
energy.
greater
ohm’s law
The potential difference V across a conductor is
directly proportional to the current that
flows in the conductor.
__________ are put in many electronic
machines to reduce the current and protect the
machine parts.
Resistors
