EE201 Fundamentals of Electric Circuits by Dr. Ibraheem Nasiruddin 1 WHEEL-1

Connect / Attend Connect: Step in Question Impose a Question: Recall from their experience what is required to construct a wall / building/ Lego game? Attend: Rally share ABAB Listen individual Responses 2 Connect: to focus their thoughts Giving students different geometric and configurations of fruits, objects, equipment, light devices, duration of time and ask them for their observation Attend: Rally share ABAB Rally share ABAB Listen individual Responses Listen individual Responses Open discussion Open discussion Attend: conclude connect and attend activity and compile thoughts Ask them to list down their observation based on the discussion Ask them to list down their observation based on the discussion List down what is expected in this course List down what is expected in this course

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UNITS, SYMBOLS AND OPERATIONS (An overview and Introduction)

Mind Map 5 TA FUNDAMENTALS TECHNICAL TERMS Units of measurements Systems of units Symbols MATHEMATICAL OPERATIONS

Basic Quantities Physical Quantities Basic Quantities There is a coherent system of units of measurement built around seven base units. This system is known as the International System of Units. It is also known as the modern form of the metric system Derived Quantities These quantities are derived from the multiplication or division of the seven basic quantities Temperature Time Length Mass Luminous intensity Amount of substance Electric current K S m Kg cd mol A Kelvin Second Meter Kilogram Candela Mole Ampere Few Examples: Area Volume Volume Velocity Acceleration m 2 m 3 ms -1 ms -2

The base quantities are also known as Fundamental Quantities. The Derived unitsThe Derived units are formed from multiplication and division of the seven base units and other derived units and are many in number i.e.; Some commonly used derived quantities are;  Speed  Work  Force  Electric Potential  Power  Frequency  Angle

8 8 Named units derived from SI base units QuantitySymbolRelationship Dimension symbol AreaAWidth x lenghtm2m2 VolumeVWidth x length x heightm3m3 Velocityu,vDisplacement/timem/s or ms -1 AccelerateaVelocity/timem/s 2 or ms -2 ForceFMass x accelerationKgms -2 or N PressurepForce / AreaPascal WorkWForce x distanceJoule or Nm PowerPWork/timeJ/s or Watt

PREFIXES Standard prefixes for the SI units of measure Multiple s Prefix deca-hecto-kilo-mega-giga-tera-peta-exa-zetta-yotta- Symbol dah kMG TPEZY Factor SI Unit: meter, gram, ampere Fractions prefix deci-centi-milli-micro-nano-pico- femto - atto-zepto-yocto- Symbol dc mμn pfazy Factor −1 10 −2 10 −3 10 −6 10 −9 10 −12 10 −15 10 −18 10 −21 10 −24

CONVERSION UNITS

10 km/h to m/s Meters into feet Kilometers into miles

Home Assignment-1 12 Solve Examples from each section Submit solution of selected question

QUIZ-1 13

The digits that carry meaning contributing to its precision. Retain all figures during calculation. The leftmost non-zero digit is sometimes called the most significant digit or the most significant figure. The rightmost digit of a decimal number is the least significant digit or least significant figure. Numbers having three significant figures: Numbers having two significant figures: Significant Figures

1.Non zero integers always count as significant figures. 2.Zeros: There are three classes of zeros. Leading zeros Captive zeros Trailing zeros 15 Rules for Significant Figures

a)Leading zeros Zeros that precede all the non zeros digit They do not count as significant figures Ex: [3 s.f] b)Captive zeros  Zeros between non zeros digits. They always count as significant figures  Ex: [5 s.f.] c)Trailing zeros  Zeros at the end of numbers. They count as significant figures only if the number contains a decimal point.  Ex: 200 [1 s.f.] 2.00 [3 s.f] 16 Rules for Significant Figures

Adding or Subtracting Ex: = The final answer is 31.1 (1 decimal places) 17 Number of decimal places for final answer =the smallest number of decimal places of any quantity in the sum Mathematical Operation For Significant Figures

1.Ohms law states that V = IR. If V = 3.75 V and I = 0.45 A, calculate R and express your answer to the correct number of significant figures. 2.If the resultant force on an object of mass 260 kg is 5.20 x 10 2 N, use equation F = ma to find acceleration. 3.If a car is traveling at a constant speed 72 km/h for a time 35.5 s, how far has the car traveled? (use distance = speed x time) 18 Exercise 1

1.R = V/I = 3.75/0.45 = Ω Due to the least s.f. (0.45 = 2 s.f.), thus the answer is 8.3 Ω 2. Due to the least s.f. (260 = 2 s.f. ), thus the answer is 2.0ms- 2 3.Changev=72km/h to m/s => 72km/3600s=20m/s 19 Due to the least s.f. (72x10 3 m/h = 2 s.f.), thus the answer is 0.71 km or 7.1x10 2 m. Solutions

Home Assignment-2 20 Solve Examples from each section Submit solution of selected question

QUIZ-2 21

Report writing 22 Ask them to do literature survey and write a report on: 1. database/charts of Symbols being used in real life. 2.database/charts of Units in use in different fields. 3.create chart/database of derived units from fundamental units. 4.demonstrate any mathematical operation being used in real life.