Basic Electricity - Senior Secondary 2 - Moving coil and moving iron instruments II

Moving coil and moving iron instruments II

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TERM: 2ND TERM

WEEK FIVE

Class: Senior Secondary School 2

Age: 16 years

Duration: 40 minutes of 5 periods each

Date:

Subject: BASIC ELECTRICITY

Topic: MOVING COIL AND MOVING IRON INSTRUMENTS II

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

I.) State the disadvantages of a moving iron instruments

II.) State the disadvantages of a moving coil instruments

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures,

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S

ACTIVITY

STEP 1

INTRODUCTION

The teacher discusses the disadvantages of a moving coil instruments

Students listens attentively to the teacher                                                                          

STEP 2

EXPLANATION

Teacher discusses the disadvantages of a moving iron instruments

Students exhibit attentiveness and active engagement

STEP 3

NOTE TAKING

The teacher writes a summarized

note on the board

The students

copy the note in

their books

 

NOTE

MOVING COIL AND MOVING IRON INSTRUMENTS II

Disadvantages of Moving Coil/Moving Iron Instruments

  1. Moving coil/moving iron instruments can be sensitive to external magnetic fields, which can introduce errors in the measurements.
  2. These instruments may have a limited measurement range compared to other types of instruments, which can restrict their utility in certain applications.
  3. The construction of moving coil/moving iron instruments can be more intricate compared to other types of instruments, making them potentially more expensive and prone to mechanical failure.
  4. Changes in temperature can affect the accuracy and reliability of moving coil/moving iron instruments, requiring compensation or calibration adjustments.

Applications of Measuring Instruments

  1. Electrical Measurements: Measuring instruments such as voltmeters, ammeters, and watt meters are used to measure voltage, current, and power in electrical circuits.
  2. Temperature Measurements: Thermometers and thermocouples are used to measure temperature in various industrial, scientific, and environmental applications.
  3. Pressure Measurements: Pressure gauges and manometers are employed to measure pressure in pneumatic and hydraulic systems, as well as in industrial processes.
  4. Flow Measurements: Flow meters are used to measure the flow rate of liquids and gases in pipelines and channels, essential in industries like water management, oil and gas, and chemical processing.
  5. Dimensional Measurements: Instruments such as calipers, micrometers, and gauges are utilized to measure dimensions accurately in manufacturing, engineering, and quality control processes.
  6. Analytical Measurements: Instruments like spectrophotometers, pH meters, and gas chromatographs are employed in laboratories for analytical measurements in fields such as chemistry, biology, and environmental science.

EVALUATION: 1. State 4 disadvantages of a moving coil instruments

  1. State 4 disadvantages of a moving iron instruments

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively