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Electric Circuits #1

QuestionAnswer
What is the unit of measure for current? Amperes (or Amps)
What is the unit of measure for voltage? Volts
What is the unit of measure for resistance? Ohms
Give an example of a good conductor. Metal (copper, aluminum, gold, silver)
Give an example of a good insulator. Plastic, rubber, wood, air, glass
What function does an SPDT switch typically perform? Switches between two different circuit paths
What function does an SPST switch typically perform? Opens or closes a circuit
What is a series circuit? An electric circuit with a SINGLE path.
What is a parallel circuit? An electric circuit with MULTIPLE paths.
What function does a capacitor perform? Stores electrical charge.
What function does a "Junction or connection" perform? It connects to parts of an electrical circuit.
What function does a "crossing, no connection" perform? It allows two wires to cross without conducting electricity.
What function does a "Battery Cell" perform? It provides energy for an electrical circuit.
What function does a "resistor" perform? It slows down the flow of electrons in a circuit.
What function does a "diode" perform? It allows current to only flow in one direction.
What function does a "Light Emitting Diode" perform? It allows current to only flow in one direction, and lights up in the correct direction.
What function does a "Variable resistor" perform? A variable resistor is a potentiometer with only two connecting wires instead of three. It allows the resistance to change.
What function does a "Potentiometer" perform? It allows for varying the voltage across a circuit by using a knob or slider.
What function does an DPST switch typically perform? Opens or closes TWO different circuits.
What function does an DPDT switch typically perform? Switches between two different circuit paths for TWO different circuits.
What does LED stand for? Light emitting diode
Is the positive side of a LED the longer or shorter wire? Longer
What is an electical circuit? A loop of conducting material that allows electrons to flow.
What is an open circuit? A circuit is open if the electron flow is stopped. For example, by a switch.
What is a closed circuit? A circuit is closed if the electrons flow.
What is a short circuit? A circuit where current does not flow through any components.
What is voltage? Measure of how much "potential energy" exists to move electrons from one point to another in a circuit.
What is current? Electrons flowing between two points.
What is resistance? A slowing of the flow of electrons.
If the voltage is constant and the resistance increases, what happens to the current? The current decreases. (I = V/R)
If the voltage is constant and the current increases, what happens to the resistance? The resistance decreases. (R = V/I)
If the current is constant and the resistance increases, what happens to the voltage? The voltage increases. (V = I*R)
If the current is constant and the voltage increases, what happens to the resistance? The resistance increases. (R = V/I)
If the resistance is constant and the voltage increases, what happens to the current? The current increases. (I = V/R)
If the resistance is constant and the current increases, what happens to the voltage? The voltage increases. (V = I*R)
When resistors are connected in PARALLEL, will the total resistance be LESS THAN or GREATER THAN any of the individual resistors? LESS THAN.
When resistors are connected in SERIES, will the total resistance be LESS THAN or GREATER THAN any of the individual resistors? GREATER THAN.
If two lamps are connected in SERIES, what will happen to the brightness of each lamp compared to only having one lamp? The lamps will be dimmer (less bright).
If two lamps are connected in PARALLEL, what will happen to the brightness of each lamp compared to only having one lamp? The lamps will be the same brightness.
Created by: mblommer on 2011-04-11



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