EGR 102 Exam 1 UKY Questions and
Answers
Voltage - ANSWERS-an electromotive force - the force caused by electrons being the same
charge and pushing each other. It is measured in volts.
Current - ANSWERS-the quantity of electrons flowing past over a given amount of time and is
measured in amps.
Resistance - ANSWERS-a measure of how difficult it is to move the current and is related to the
energy expended moving. It is measured in Ohms, abbreviated Ω.
We had a water analogy for electricity. What is the electrical equivalent of pressure? Water flow
rate? Restrictions in the pipe? - ANSWERS-In the water analogy the pressure is the same thing
as the voltage, the water flow rate the same thing as current and restrictions in the pipe the
resistance.
Capacitor - ANSWERS-
Diode - ANSWERS-
LED - ANSWERS-
Resistor - ANSWERS-
Push Button Switch - ANSWERS-
, Ground Diagram - ANSWERS-plunger looking thing(3 separate lines)
Battery Diagram - ANSWERS-
NPN Transistor - ANSWERS-
PNP Transistor - ANSWERS-
Why are transistors important in computers? - ANSWERS-electrically-controlled switches inside
computers that allow voltages to represent numbers (1 is turned on and 0 is turned off - the
basis for binary numbers)
If you have only one PN junction, what type of component do you have? - ANSWERS-One PN
junction is a diode. Two give you a transistor. (our LED is a light emitting diode)
How do you turn "on" an NPN transistor? - ANSWERS-The NPN transistor turns on when voltage
is applied to the base "B" . That lets current flow from the collector "C" to the emitter "E".
What kind of device is an Arduino, and what are things like Arduinos used for? - ANSWERS-
boards with microcontrollers on them (on our board, the large chip).They are very useful when
you need a small computer to do things like monitor sensors, run a test stand, or gather data
remotely.
How to find effective resistance? (Parallel Circuit) - ANSWERS-1/[(1/R1)+(1/R2)...+(1/Rn)]
What happens if there are no resistors in a circuit? What would happen to an LED if it were
placed in the circuit? - ANSWERS-Open circuit, it would burn up/explode.
Voltage Divider - ANSWERS-turns larger circuit into a smaller one
Answers
Voltage - ANSWERS-an electromotive force - the force caused by electrons being the same
charge and pushing each other. It is measured in volts.
Current - ANSWERS-the quantity of electrons flowing past over a given amount of time and is
measured in amps.
Resistance - ANSWERS-a measure of how difficult it is to move the current and is related to the
energy expended moving. It is measured in Ohms, abbreviated Ω.
We had a water analogy for electricity. What is the electrical equivalent of pressure? Water flow
rate? Restrictions in the pipe? - ANSWERS-In the water analogy the pressure is the same thing
as the voltage, the water flow rate the same thing as current and restrictions in the pipe the
resistance.
Capacitor - ANSWERS-
Diode - ANSWERS-
LED - ANSWERS-
Resistor - ANSWERS-
Push Button Switch - ANSWERS-
, Ground Diagram - ANSWERS-plunger looking thing(3 separate lines)
Battery Diagram - ANSWERS-
NPN Transistor - ANSWERS-
PNP Transistor - ANSWERS-
Why are transistors important in computers? - ANSWERS-electrically-controlled switches inside
computers that allow voltages to represent numbers (1 is turned on and 0 is turned off - the
basis for binary numbers)
If you have only one PN junction, what type of component do you have? - ANSWERS-One PN
junction is a diode. Two give you a transistor. (our LED is a light emitting diode)
How do you turn "on" an NPN transistor? - ANSWERS-The NPN transistor turns on when voltage
is applied to the base "B" . That lets current flow from the collector "C" to the emitter "E".
What kind of device is an Arduino, and what are things like Arduinos used for? - ANSWERS-
boards with microcontrollers on them (on our board, the large chip).They are very useful when
you need a small computer to do things like monitor sensors, run a test stand, or gather data
remotely.
How to find effective resistance? (Parallel Circuit) - ANSWERS-1/[(1/R1)+(1/R2)...+(1/Rn)]
What happens if there are no resistors in a circuit? What would happen to an LED if it were
placed in the circuit? - ANSWERS-Open circuit, it would burn up/explode.
Voltage Divider - ANSWERS-turns larger circuit into a smaller one
