"Measurement of Current" Current and Circuit PPT Courseware 9

Description

"Measurement of Current" Current and Circuit PPT Courseware 9

current

1. Current intensity: indicates the size of the current

Current intensity Abbreviation Current Symbol I

2. The basic unit of electric current: Ampere, abbreviated as A, symbol A

Commonly used units: milliampere (mA) and microampere (μA)

Conversion relationship: 1A=1000mA 1mA=1000 μA

Introduction to physicists

Ampere was a French physicist who had read extensively since childhood and had an amazing memory and extraordinary mathematical talents. In September 1820, he conducted in-depth research on the interaction between electric currents and achieved fruitful results in a short period of time.

2. Connection of ammeter:

(1) The ammeter must be connected in series with the electrical appliance being measured.

(2) Current must flow in from the positive terminal and flow out from the negative terminal.

(3) The measuring range must be selected correctly.

(4) It is not allowed to connect the ammeter directly to the two poles of the power supply!

Rules for using ammeter

The ammeter should be connected in series in the circuit

Current flows into the ammeter from the "+" terminal and out from the "-" terminal.

The magnitude of the current being measured cannot exceed the range of the ammeter.

Do not connect the ammeter directly to the poles of the power supply.

3. Reading of ammeter:

(1) Clarify the range of the selected ammeter;

(2) Determine the graduation value of the ammeter;

(3) Read the number from the pointer position.

practice

1. Connect the physical diagram. It is required that two lamps be connected in parallel. The switch controls the two lamps. The ammeter measures the current of lamp L2 (about 0.5 A) and draws the circuit diagram.

2. Connect the physical diagram according to the given circuit diagram.

3. The switch controls __________, ammeter A1 measures the current of __________, and ammeter A2 measures the current of __________. Then draw the circuit diagram.

Keywords: Current and circuit teaching courseware, current measurement teaching courseware, Lujiao version ninth grade physics PPT courseware download, ninth grade physics slide courseware download, current and circuit PPT courseware download, current measurement PPT courseware download, .PPT Format;

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.

"Measurement of Current" PPT courseware:

The first part of the "Measurement of Electric Current" PPT courseware content: The strength of electric current 1. Current: a physical quantity indicating the strength of electric current, symbol I 2. Unit: Ampere, symbol A. There are also milliamps (mA) and microamps (A) 3 , Current unit conversion relationship: 1A＝1000mA 1mA＝100..

"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...

"Measurement of Current" Current and Circuit PPT Courseware 8:

"Measurement of Current" Current and Circuit PPT Courseware 8 Experience: The Strength of Current Activity Preparation: A small light bulb, switch, wire, and two dry batteries. Activity 1: Connect a small light bulb to the circuit using a dry battery. Close the switch and observe the brightness of the bulb. Disconnect switch..

File Info

Update Time: 2024-09-01

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

Preview