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Electric currents when connected to a potential difference, it creates a(n) _ field which creates a(n) _ force setting _ in motion
electric, electrical, charges
Since batteries and generators don't give the circuit charges, the just...
force the charges to move in one direction *note, the electrons are already on the wire
The electrical force _ the electrons to/from the positive terminal and the electrons are _ to/by the negative terminal
Electrons move from an area of (high/low) electric potential to an area of (high/low) electric potential (AKA voltage)
How does the flow of current in batteries work?
The negative terminal loses negative charge and eventually becomes positive. The positive terminal gains negative charge and eventually becomes neutral. Once the charges even out, there is no longer a potential difference between them, and the flow of electrons (current) stops
The direction that positive charges would flow (if they did flow)
conventional current, positive to negative
Do you know how to draw pictures of both conventional flow notation and electron/actual flow notation?
The smaller the area (or thinner) = _ resistance, the larger the area (or thicker) = _ resistance
The amount of current that flows through a circuit is _ly proportional to the voltage supplied to the source
The amount of current that flows through the circuit is _ly proportional to the resistance of the conductor
In a 120 volt electrical outlet, every Coulomb of charge does _ Joules worth of work as it moves from one side of the outlet to the other
An electrical device that stores electrical charge and energy which can be removed for use at a later time
Two conductors, separated by an insultar. Acts as a storehouse of charge that can be reclaimed when needed
Used in electronic devices to maintain power supply while batteries are being charged, prevents memory loss
Thing where plates are connected to a potential difference (voltage source) such as a _
parallel-plate capacitor, battery
How do parallel-plate capacitors work?
charge is removed from one plate and collects on the opposite plate
When do charge transfers stop in parallel-plate capacitors?
when the potential difference of the plates equals the potential difference of the battery it's connected to
How is discharging done in a parallel-plate capacitor?
by connected the capacitor to a conductor via a switch (ex. flash of a camera)
What condition is necessary for the flow of heat? What analogous condition is necessary for the flow of charge?
temp difference, potential difference
What is meant by potential difference? What does a potential difference produce in a circuit?
What conditions are necessary for the sustained flow of water in a pipe? What analogous condition is necessary for the sustained flow of charge in a wire?
pressure difference, potential difference
If the voltage impressed across a circuit is constant but the resistance doubles, what change occurs in the current?
cut in half (inverse)
If the resistance of a circuit remains constant while the voltage across the circuit decreases to half its former value, what change occurs in the current?
cut in half (direct)
Distinguish between AC and DC. Which is produced by a battery and which is usually produced by a generator?
alternating current in generators or outlets (2 way), direct current in batteries (1 way)
From where do electrons originate that flow in a typical electric circuit?
on the wires or conductors
Drawings that represent electric circuits using standards symbols for circuit elements
What are 3 things found in a common circuit?
voltage source (battery, generator, etc), conductor (wire), device to receive electrical energy (light bulb)
What will happen if there is a break in an electric circuit?
here will be a complete stop in the flow of electrons
Electric current that repeatedly reverses in direction, twice each cycle. Usually at 60 cycles per second
Which type of circuit allows current to travel great distances with easy voltage step-ups that result in lower heat losses in wire?
What 2 things can be inserted into lines that provide power to prevent overloading?
fuses and circuit breakers
What will excessive current do to the fuse, circuit breaker, and circuit?
blow out the fuse, trip the circuit breaker, and provide a break in the circuit
According to _ Law, in a series circuit there is a voltage drop across each device that depends directly on its _
Resistors are connected such that there are multiple pathways for electrons to flow
What do you notice about the series circuit formula for total current and the parallel circuit formula for total current?
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