"Measurement of Current" Current and Circuit PPT Courseware 6

Description

"Measurement of Current" Current and Circuit PPT Courseware 6

learning target

1. Understand the size of current, know the units and symbols of current, and care about the current value of electrical appliances in daily life.

2. Know the rules for correct use of ammeters

3. Understand the range of the ammeter and be able to read the ammeter’s indication.

1. How to express the strength of current

Self-study textbook, found:

1. How to express the strength of current

2. Symbol, unit and unit conversion of current

Current is a physical quantity that represents the strength of electric current (I)

Unit Ampere A

Other units: mA μA

1mA=1×10-3A 1μA=1×10-6A

Note: The current is represented by I, and the unit ampere is represented by A.

2. Connect the ammeter

1. Understand the ammeter

Observe the ammeter on the table and think:

①What’s with the two rows of scales and three binding posts?

Corresponding to two ranges:

0~0.6A 0~3A

②What is the screw in the middle for? Zero adjustment

2. Connect the ammeter

On page 111 of the self-study textbook "How to connect an ammeter", try to connect the physical diagram and explain why it is connected like this.

First, the current must flow in from the red terminal and out from the black terminal.

Second, ① the measured current should not exceed the range of the ammeter. ②Choose the measuring range correctly.

Third, the ammeter must be connected in series with the electrical appliance being measured.

3. Readings of ammeter

The self-study textbook "How to Read an Ammeter" summarizes the reading method.

0~0.6A range: graduation value is 0.02A

0~3A range: graduation value is 0.1A

0~0.6A: 0.3A

0~3A: 1.5A

0~0.6A: 0.4A

0~3A: 2A

The pointer is at the same position, and the large-range reading is 5 times the small-range reading.

reward

1. Current is a physical quantity that represents the strength of the current, represented by I.

The unit of electric current is ampere, and its symbol is A.

2. Connection of ammeter:

① Positive input and negative output ② Connect in series with the electrical appliance under test

3. Readings of the ammeter: pay attention to the range and graduation value.

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For more information about the "Measurement of Current, Current and Circuits" PPT courseware, please click on the "Measurement of Current ppt Current and Circuits ppt" tag.

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"Measurement of Current" PPT:

"Measurement of Electric Current" PPT Part One Content: Teaching Objectives 1. Understand the basic concepts of electric current. 2. Know the current values ​​of some household appliances. 3. Practice and master the current measurement methods and procedures. 4. Able to read ammeter according to standard methods. 5. Can press the button...

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Update Time: 2024-07-02

This template belongs to Physics courseware Lu Jiao Edition Ninth Grade Physics Volume 1 industry PPT template

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