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37 Cards in this Set
- Front
- Back
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The unit for electrical resistance is ....
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ohm
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The unit for voltage is...
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volt, V
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The unit for current is...
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Amperes, A
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Current is represented in formulas with the letter....
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I
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The speed of electrons through a wire, or "charges per second", is called....
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current
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Like water pressure, the "electrical pressure" or potential in a wire is called...
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voltage
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Anything in a circuit that will slow the flow of electricity is providing a ____, measured in ohms.
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resistance
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In a _____ circuit, if you remove or unscrew a light bulb, then the other light bulbs or appliances stay on.
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parallel
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In a ____ circuit, if you unscrew a light bulb, all the other bulbs or appliances in the circuit go out.
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series
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In a _____ circuit, the electricity is taking a "bypass" pathway or path of least resistance, and can cause a fire.
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short
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In a parallel circuit with 3 light bulbs, if one bulb is unscrewed, then the other 2 bulbs ....
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remain lit with about the same intensity as before.
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In a series circuit with 3 light bulbs, the bulbs are all of ____ intensity because they are splitting the voltage 3 ways.
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low.
If you reduce to 2 bulbs, they get brighter. |
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Identify which one is the series and which one is the parallel circuit.
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Left = series
Right = parallel |
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In which one of these circuits will all bulbs go out if one bulb is unscrewed?
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The left one, series
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In which one of these circuits will 2 bulbs will remain lit at full intensity if the 3rd bulb is removed?
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The right one, parallel
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What kind of circuit is this?
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Series
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What kind of circuit is this?
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parallel
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Note that there are 6 batteries in series, each with 1.5 V. How many volts total are being delivered to the bulbs?
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6 x 1.5 V = 9 V
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I = _____ / _________
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Volts / Resistance
V / R |
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V = ______ x _____
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Current x resistance
I x R |
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R = _____ / ______
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Volts / Current
V / I |
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P = ______ x ______
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Volts x Current
V x I |
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A kW is _____ Watts
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1000
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This Greek letter, omega, represents the unit for ____ and that unit is called the _ _ _.
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resistance
ohm |
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Will the reistor and light bulb in this circuit operate in the condition shown?
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Yes. The switch is closed. Battery is making contact with both sides.
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Will the bulb and resistor operate in this circuit?
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No. The switch is open. Electricity can make it through the circuit.
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In this circuit, will the bulb and resistor each get 12 volts?
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No. They have to split the voltage, depending on how much resistance each one has.
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In this circuit, will the resistor and the bulb each get 12 volts?
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Yes. In a parallel circuit, each device is directly connected to the battery, giving it full voltage.
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This is the circuit symbol for a ____
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light bulb
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This is the circuit symbol for a ____.
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battery
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In a circuit, this is the symbol for a ____.
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resistor
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In a circuit, this is the symbol for a _____.
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switch (and it is open & thus current won't flow)
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Will these bulbs light in the way they are connected?
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Yes
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Will these bulbs light in the way they are connected?
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Yes
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Will these bulbs light in the way they are connected?
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No
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Will these bulbs light in the way they are connected?
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No
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What will happen to the fuse in this circuit with that "bypass" wire going around the light bulb?
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It will melt and stop the current from flowing. It will prevent a fire from occurring. This is a SHORT circuit.
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