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convert MilliAmperes to Amperes
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Milliampers divided by 10 = Amperes |
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| Ohm's Law Formula for finding Power |
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Definition
Calculate Amps I=V/R
Then Calculate Watts W=VxI |
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| Capacitive Reactance does what with frequency |
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| decreases with increasing frequency |
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| Ohm's Law Triangle for Voltage |
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Definition
V
I R
To find Voltage cover the V with your finger and fill in values for I(amps) and R(resistance)
V = I x R |
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| Ohm's Law Triangle for Amperes or Ammeters |
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Definition
V
I R
Cover I (amps) with finger and find the values for V(volts) and R (resistance)
Formula I = V/R |
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| Ohm's Law for finding Resistance |
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Definition
V
I R
to find resistance cover R with your finger and find values for Volts (v) and Ampes (I)
Formula is R = V/I |
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| Easy way to remember Ohm's Law |
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Definition
Find Value's (what values are given)
Find Equation (determine which equation will be used)
Find Numbers (do the math)
Very Easy Now |
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| What is the Basic Unit of Resistance |
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| How to calculate voltage drop across series resistors. |
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Definition
Step 1: Determine Current of total resistors across the series.
(I = Current/V=Voltage/R(t)=Resistance Total)
I = V / R(t)
I = 9 / (2k + 5k + 10K)
I = .53 mA
Step 2: Now that we have the Current across the resistors we can calculate the voltage across EACH resistor.
I = Current
Vx=Voltage (x=Current Value across X Resistor)
Rx=Resistor value(x=resistor#)
V = I x Rx
V1 = .53 mA x 2k
V1 = 1.06V
V2 = .53 mA x 5k
V2 = 2.65
V3 = .53 mA x 10k
V3 = 5.3V
V1 + V2 + V3 = 9.01 (voltage is 9V only 9.01 because i rounded up from .529 to .53) At .529 you can see barely a difference:
V1=1.058V
V2=2.645V
V3=5.290V
V Total= 8.993V
Also If the resistors are all the same value its easier. |
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| In a A/C circuit, if the power factor equals .5, then the __________power is one half the ____________power. |
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| The total resistance will always be lower than that of the smallest resistor. |
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| How to Find resistance Total in parallel circuit if Ohms are provided. |
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Definition
Divide all R(ohms) by 1 then add them together.
Example
1/ (1/120 + 1/82 + 1/270 + 1/180) this approximates to.....
1/ (0.0083 + 0.0122 + 0.0037 + 0.0056) which becomes...
1/ 0.0298 giving us .....
Total R = 33.6 Ohms
Always Round! |
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| value of current in the circuit |
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Definition
Find the Resistance Total First then divide by Voltage.
* note * divide all Ohms by 1 then add together. Then apply Ohms Law I = V/R
Example V =28 R1=4, R2=4, R3=6
R1=1/4 = 0.25
R2=1/4 = 0.25
R3=1/6 = 0.16
0.25 + 0.25 + 0.16 = 0.66v
I = 28/0.66 = .02(I) |
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| In a RCL circuit the phase difference between voltage and current is |
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Definition
| Less than 90 degrees between voltage and current. |
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| Formula to convert Volts to Kilovolts(kv) |
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Definition
Kilo = 1000 Take Volts and divide by 1000
v/1000 |
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| electrical door bell has a resistance of 70 ohms and requires a current of 2 Amps, the voltage necessary to operate the bell is |
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Definition
Ohm's Law Formula would be V=I*R
V=2*70 V=140
Answer in KV is .14 which is v/1000 |
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| The A/C voltage across a pure inductance is said to |
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Definition
| be in phase with the current |
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Term
| two materials most commonly used in the manufacture of transistors are: |
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Definition
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| Formula to find Total Resistance if all have the same value. |
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Definition
Rt = R/N
R is the Value of each resistor.
N is the Number of Resistors. |
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| Formula to find resistance if two resistors have different values. |
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| Rt = R1 X R2 divided by R1 + R2 |
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| total resistance of parallel circuit with three or more resistors |
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Definition
| Rt = 1 divided by 1/R1 + 1/R2 + 1/R3 etc |
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Definition
The SI prefix "micro" represents a factor of 10-6, or in scientific notation, 1E-6.
So 1 microHenry = 10-6 Henry.
or
.000001 h |
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| How to find Ammeter in the circuit |
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Definition
| Ohm's Law Formula should be I = V/R |
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| impedance of an A/C circuit is equal to |
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Definition
| the total opposition to current flow |
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| How to find total current in circuit |
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Definition
| we have to find out the total voltage ,then resistance then finally you can find out the current |
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| A current that continually changes in amount and periodically changes it’s direction is called: |
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Definition
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| in a Series Circuit how do you find total voltage? |
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| The total voltage is the sum of the voltage on each component. |
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| how to find total resistance in a series circuit? |
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| The total resistance is equal to the sum of the resistance on each component. |
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| The logic circuitry that allows a computer to communicate with the outside world is know as the |
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Definition
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| The unit that performs arithmetic and logic operations is the |
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| ALU - Arithmetic Logic Unit |
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| What is a Digial Multimeter |
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Definition
| Used to mesaure the voltage, current, or resistance in an electric circuit |
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Definition
| To View and Measure AC waveforms. |
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| A Volt is a measure of what? |
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Definition
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| When applied frequency is increased in a circuit containing both an inductor and a capacitor what happens. |
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Definition
| inductive reactance increases |
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| 200 Micro Farads is the same as |
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Definition
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| The DC resistance of a conductor is determined by |
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Definition
| The length, Thickness and temperature |
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Definition
| The sum of all of the voltage drops in a circuit always equals the supply voltage, such as the battery voltage. |
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| How to find voltage drop on a complex circuit. both parallel and series. |
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| First find total resistance of the parallel circuits (R1 xR2) / (R1+ R2) = Rt. Add that to the ohm in the series and it equals the total ohms. Now find total current using I=V/R. I = V/R. So I = 70 volts/70 ohms = 1 amp. Now calculate voltage drop using V = I x R So V of R1 = 1 amp x 57 ohms = 57 volts. |
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| convert milliamps to amps |
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Definition
| take milliamps and divide by 1000 |
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Definition
| Electrical tension (or voltage after its SI unit, the volt) is the difference of electrical potential between two points of an electrical or electronic circuit, expressed in volts.[1] It is the measurement of the potential for an electric field to cause an electric current in an electrical conductor. |
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An attenuator is an electronic device that reduces the amplitude or power of a signal without appreciably distorting its waveform.
An attenuator is effectively the opposite of an amplifier, though the two work by different methods. While an amplifier provides gain, an attenuator provides loss, or gain less than 1. |
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| software includes what types of things |
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| programs, routines, symbolic languages all of the above. |
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| How many time constants are required to charge a capacitor to 100% of the source voltage. |
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Definition
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| High speed data transmission would be done as |
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| a device that increases measured loss in a circuit is called a |
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Definition
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| A circle on a flow chart indicates |
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Definition
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| A resonant A/C circuit offers what? |
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Definition
| Minimum impedance to current flow. |
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| A rate of electron flow in a circuit is expressed in units called what? |
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Definition
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| Convert Milli amperes to AMperes |
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Definition
| take milliamps and divide by 1000 |
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| To find voltage when ohms and amps are provided |
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Definition
| v=I x R example 70ohms requires current of 2amps. find voltage. v=2X70=140 then to convert to KV 140/1000 = .14kv |
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