Assignment (C288)

solving circuit information using Ohm's Law
V=IR
1. Series Circuit: V=12V, R1=3 Ohms, R2=9 Ohms
        a. circuit current I=V/(R1+R2)=12 V / (3 Ohms +9 Ohms) = 12/12= 1 A
        b. Voltage drop across R1. V=IR1=1A x 3 Ohms = 3V
        c. Voltage drop across R2. V=IR2= 1A x 9 Ohms = 9V
        d. Total Resistance. Rt=R1+R2 = 3 Ohms + 9 Ohms = 12 Ohms
        e. Diagram

2. Parallel Circuit
         V=12 V, Branch 1: R1=2 Ohms and Branch 2: R2 4 Ohms
            a. Circuit Current: I=V/R; 1/Rt=1/R1+1/R2=3/4, Rt=4/3, I=12x3/4=9 A
            b. Voltage drop across R1 = 12 V
            c. Voltage drop across R2 = 12 V
            d. Circuit Resistance: Rt=R1R2/(R1+R2)=2x4/(2+4)=1.33 Ohms
            e. Current through R1: I1=V/R1=12V/2 Ohms=6 A
            f. Current through R2: I2=V/R2= 12/4=3 A
           g. Circuit Diagram

3. Series-Parallel (Compound) Circuits

        V=12 V, R1=2 Ohms in series with parallel of R2=3 Ohms and R3 = 3 Ohms

            a. Circuit Current: I=V/Rt; Rt=R2R3/(R2+R3)+R1=1.5+2=3.5 Ohms; I=12/3.5=3.43 A

            b. Voltage Drop across R1: 3.43 A x 2= 6.86V

            c. Voltage Drop across R2 and R3: 3.43A x 1.5 Ohms = 4.145 V

            d. Total Circuit resistance: Rt= R2R3/(R2+R3)+R1=9/6+2=3.5 Ohms

            e. Circuit diagram:

Logic Probe

Wiring Diagram

both Red and Green LEDs should light up when connected. as per diagram, current flows from positive to negative in circuit. both leds will receive "+" and "-" at correct polarity.

when probe (metal Rod) contacts the Battery positive it creates a new circuit where Probe becomes + and current flows from probe Positive to negative through Red LED. Green LED will receive positive at both terminals (anode and cathode)

Red LED will become brighter once contacts Battery positive. Current flow would go from Positive Probe to negative through Red LED and Resistor (R2) avoiding Green LED's Resistor (R1).

Meter Symbol convesions 2

                                                                                    Name:  Roman Borovikov___

                                                                                    Date: ______________________

                                                                                    Instructor OK:  _______________

Meter Unit Symbol Conversions Exercise 2

Practice converting from one unit of measurement to another. The value of the reading should stay the same, but it is expressed in another unit of measurement. (Example from K ohms to ohms, or millivolts to volts.)

1.  2.3 K ohms                                   = ___2300___ ohms

2.  934 millivolts                                = ___0.934__ volts

3.  4.76 K ohms                                = ___4760___ ohms

4.  4 milliamps                                   = ___0.004____ amps

5.  24 K ohms                                    = ____24000_ ohms

6.  4.7 milliamps                               = ___0.0047_ amps

7.  457 milliamps                              = ___0.457___ amps

8.  1014 millivolts                             = ____1.014__ volts

9.  0.568 K ohms                              = _____568___ ohms

10.  31 K ohms + 132 ohms           = ____31 132__ ohms

11.  1500 ohms                                 = ____1.5__ K ohms

12.  0.000225 amps                         = ____0.225__ milliamps

13.  0.887 volts                                 = ________887__ millivolts

14.  5.1 K volts                                  = _____5 100 000__ millivolts

15.  121,955 ohms                           = ___121.955__ K ohms

16.  143,000 milliamps                    = ____143____ amps

17.  125 millivolts + 11.875v           = _____12___ volts

18.  310,000 ohms                           = _____0.31_ M ohms

19.  0.00045 amps                           = ____0.45____ milliamps

20.  1,200 millivolts                          = ___1.2__ volts

Meter unit convesions 1

                                                                                    Name: ____Roman Borovikov__

                                                                                    Date: ______________________

Meter Unit Symbol Conversions Exercise 1

Practice representing a numeric value into different units of measurement. Notice the value remains the same, even though it is expressed using different symbols and the decimal place has moved to different positions.

Convert the following into it’s equivalent values:

               Milli (m)                      Base Unit                  Kilo (K)                       Mega (M)

1.         1,700,000 mV           ____1,700 V__         ___1.7 KV____        __0.0017MV__

2.         _2,200,000 mΩ_       ____2,200 KΩ___    ____2.2 KΩ____      ___0.0017 MΩ_

3.         _358,000 mA__        _358 A_______        ____0.358 KA__      __0.000 358 MA

4.         __578,000 mΩ_        __578 Ω_____          _____0.578 KΩ_      __0.000 578 MΩ___

5.         ____757,000 mA      ___757 A_____        __0.757 KA__           __0.000757 MA__

6.         ______1,300 mV_   ___1.3 V_____         _0.001 3 KV__          0.000 001 3 MV_

7.         ____143,000 mΩ _  ____143 Ω_____     ____0.143 K Ω _      0.000 143 M Ω

8.         2,125,000,000 m Ω _2,125,000 Ω _         ____2,125 K Ω ___  ____2.125 M Ω _

9.         __0.775 mA__          ___0.000 775 A__   0.000 000 775 KA    0.000 000 000 775 MA

10.       __753 mA_____       ___0.753 A___         _0.000 753 KA_       0.000 000 753 MA_

11.       _4,780 000 m Ω _     ___4,780 Ω _____   _4.78 K Ω ______    _0.004 78 M Ω _

12.       3,520,000,000 mA    __3,520,000 A_        __3,520 KA__           ___3.52 MA__

13.       __793 mV___           _0.793 V_____         0.000 793 KV_          0.000 000 793 MV_

14.       _3,473,000 m Ω        ___3,473 Ω ___        ___3.473_K Ω __     __0.003 473 M Ω __

15.       58,870,000,000 mV 58,870,000 V__        __58,870 KV___      ___58.87 MV_

16.      ___560,000 mV_      ____560 V____        ____0.56 KV__        __0.000 56 MV__

17.      246,782,300 m Ω      __246782.3 Ω ___   246.782 3 K Ω _       0.246 782 3 M Ω _

18.      __340 m Ω ____       _0.34 Ω _______     0.000 34 K Ω __       ­­_0.000 000 34M Ω