Introduction
Measurement and Calculation in Electrical
Electrical measurements are the methods, devices and calculations used to measure electrical quantities. Measurement of electrical quantities may be done to measure electrical parameters of a system.
The measurement of electrical energy is completely dependent on power which is measured in watt, kilowatts, Megawatts, gigawatts, and time which is measured in an hour. Joule is the smallest unit of energy. But for some bigger calculation, some better unit is required. So, the unit used for electrical energy is watt-hour.
Watts are the basic unit of power in which electrical power is measured or we can say that rate at which electric current is being used at a particular moment.
Pre-Test
Multiple Choice:
Direction: Choose the correct answer and write only the letter on your answer
sheet. Answer the questions in the Quizizz. Click the link below:
https://quizizz.com/join/quiz/621f3cd0d4a8d1001ef9966e/start?studentShare=true
Task
LEARNING OUTCOMES:
At the end of this Lesson, you are expected to understand and select measuring tools and instruments.
Process
Information Sheet 1.1
MEASURING TOOLS AND INSTRUMENTS
Measurement is the process or the result of determining the ratio of a physical
quantity, such as a length, time, temperature, etc., to a unit of measurement, such as the
meter, second or degree Celsius. The science of measurement is called metrology.
The English word measurement originates from the Latin mēnsūra and the
verbmetiri through the Middle French mesure.
Electrical measuring tools and instruments are sensitive and delicate so extra care is
necessary in handling them. These are used to measure currents, voltages, resistances,
wattages and other important elements in electrical works. This topic, will tackle the
function/use of each measuring tool and instrument used in doing a electrical task. Different
kinds of measuring tools and precision measuring instruments are as follows:
Click the link for the discussion.
Definition of Terms
Amperage (Amps) - a unit of measurement of electrical current flow
Ampere - a unit of measurement which describes the amount of electric current
passing a certain point at a particular time
Centimeter - hundredth of a meter
Inch - a portion of a foot, which is an English unit of linear measurement
Megger - an instrument used to measure the insulation resistance of conductors or
wire. It gives measurement in ohms or meg-ohms
Millimeter - one-thousandth of a meter
Multi-tester - an electrical measuring instrument used to measure the voltage, the
resistance or the current of a circuit. It is connected either through parallel or series
with the circuit depending on what to measure
Ohm - the unit of measurement used to express resistance
Ohmmeter - an instrument used to measure resistance in ohms
Volt - a unit of measurement of electrical pressure or voltage
Voltmeter - an instrument specially designed for measuring voltage
Wire Gauge - used to measure the diameter of magnetic wire
Evaluation
How Much Have You Learned?
Self-Check 1.1
PUZZLE
A.
Directions: Find the words that is related to the measuring tools and instruments in electrical.
Click the link: https://puzzel.org/en/wordseeker/play?p=-Mx9BlnBE4NS4RdDewL1
B.
Directions: Describe at least two of your answer in activity A.
1.__________________________________________________________
___________________________________________________________
___________________________________________________________
___________________________________________________________
2.__________________________________________________________
______________________________________________________________
______________________________________________________________
______________________________________________________________
How Do You Apply What You Have Learned?
Activity Sheet 1.1
Directions: Using a pull-push rule measure the length, width, and thickness/height of
the following in inches and centimeter. Use WPS/WORD for the answers and upload in Google Classroom.
Object to be Measured
1.Table
2.Chair
3.Cabinet
4.Door
Conclusion
Importance of Measuring Tools and Instrument in
- Structure. This was saved for last because it is the common theme that is found in all the multitude of reasons for the importance of measurements. Measurements provide structure and remove the chaos that would result without any congruent method of understanding weight, mass, temperature, etc.
Credits
Electrical4U. (2020). Measurement of Electrical Energy. Retrieved from Measurement of Electrical Energy | Electrical4U
Math Work Sheet. (n.d). 10 Everyday Reasons Why Measurement is Important in your Life. Retrieved from https://www.mathworksheetscenter.com/mathtips/whymeasurement.html#:~:te….
Teacher Page
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