People's Education Edition Physics for Grade 8, Volume 2
People's Education Edition Ninth Grade Physics Complete Book
Shanghai Science Edition Ninth Grade Physics
People's Education Edition Physics for Grade 8, Volume 1
Beijing Normal University eighth grade physics volume one
Shanghai Science Edition 8th Grade Physics
Lu Jiao Edition Ninth Grade Physics Volume 1
Beijing Normal University Ninth Grade Physics Volume 1
Guangdong and Shanghai Edition Ninth Grade Physics Volume 1
Lu Jiao Edition Ninth Grade Physics Volume 2
Lu Ke Edition High School Physics Compulsory Course One
People's Education Press High School Physics Compulsory Course II
Beijing Normal University Ninth Grade Physics Volume 2
Lu Jiao Edition Eighth Grade Physics Volume 2
Guangdong and Shanghai version of eighth grade physics volume 2
Lu Jiao edition eighth grade physics volume 1
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Category | Format | Size |
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Shanghai Science Edition Ninth Grade Physics | pptx | 6 MB |
Description
"Measuring Voltage" Understanding Circuit PPT Courseware
Question 1: What is voltage?
Voltage causes free charges in a circuit to __________ to form an electric current.
The role of power in a circuit is to provide __________.
Now let's think about the devices in our lives that can provide voltage:
(1) ______ is a device that provides voltage.
(2). The symbol of voltage: _____.
(3). The main international unit of voltage: _____ Abbreviation: _____,
Symbol: _____.
Commonly used units: kilovolts (kV) millivolts (mV)
Conversion relationship: 1kV=1000V 1V=1000mV
(4) Common voltages
The voltage of a dry cell: 1.5V
Safety voltage for human body: not higher than 36V
The voltage of electricity used in domestic life in my country: 220V
Do you understand?
1. Under the action of _____, charges move in a direction to form an electric current.
2. The symbol for voltage _____, the international unit is _____, represented by the letter _____.
3. (1) The safe voltage for the human body is volts
(2) The voltage of a dry cell is _____ volts = _____ millivolts
(3) The voltage of household circuits in my country is _____ volts = _____ kilovolts
Question 2: How to use a voltmeter?
(1) An instrument that measures voltage is called a voltmeter. Its symbol in the circuit is v
(2), ammeter-voltmeter
Question 3: How to use a voltmeter to measure circuit voltage?
(1) Group cooperation and exploration:
Please use a voltmeter to measure the voltage of one dry cell, two dry cells in series, and the total voltage of three dry cells in series.
(2) Explore the rules of voltage in series circuits
1. Ask questions:
2. Conjectures and Assumptions
3. Make plans and design experiments
4. Conduct experiments
5. Collect experimental data
6. Analysis and demonstration
7. Evaluation and communication
Kind tips
Experimental notes:
1. The switch should be turned off when connecting the circuit
2. Select the appropriate range of the voltmeter
3. The voltmeter should be connected in parallel with the electrical appliance being measured.
4. Do not connect the positive and negative terminals of the voltmeter reversely.
Analysis and Demonstration
From the data we can see:
The voltage across a series circuit is equal to the sum of the voltages across each part of the circuit.
UAD=UAB+UCD
Let’s talk about: What I gained from studying this course
1. The concept and unit of voltage, and common voltages in life.
2. How to use the voltmeter.
3. Measurement of power supply voltage.
4. Characteristics of voltage in series and parallel circuits.
self-test
Self-test:
1. Under the action of _____, charges move in a direction to form an electric current.
2. The symbol for voltage _____, the international unit is _____, represented by the letter _____.
3. (1) The safe voltage for the human body is _____ volts.
(2) The voltage of a dry cell is _____ volts = _____ millivolts.
(3) The voltage of household circuits in my country is _____ volts = _____ kilovolts.
4. In the circuit shown in the figure, when the switch S is closed, the voltage measured by the voltmeter is ( )
A. The voltage across the lamp L1 B. The voltage across the lamp L2
C. The voltage across the lamp L1 and L2 D. The power supply voltage
5. In the circuit shown in the figure, A and B are two electricity meters. After closing the switch S, both light bulbs can emit light, then ( )
A. A is an ammeter and B is a voltmeter. B. A is a voltmeter and B is an ammeter.
C. A and B are both ammeters. D. A and B are both voltmeters.
6. In the circuit as shown in the figure, if the voltmeter V1 reads 4.5, the V2 reading is _____V, and the V3 reading is _____V.
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For more information about the PPT courseware "Understanding Circuits and Measuring Voltage", please click the "Understanding Circuits and Measuring Voltage ppt" tag.
"How to Understand and Measure Voltage" Exploring Simple Circuit PPT Courseware 2:
"How to Recognize and Measure Voltage" Exploring Simple Circuit PPT Courseware 2 Voltage is the cause of the formation of current. Why does the small light bulb light up when the switch is closed (click the switch)? How is electric current formed? 1. Water flow: water height difference (water level difference, water pressure difference) water pressure...
"How to Understand and Measure Voltage" explores simple circuit PPT courseware:
"How to Recognize and Measure Voltage" Exploring Simple Circuit PPT Courseware Learning Objectives 1. Know what voltage is, know that a power supply is a device that provides voltage, and know the units of voltage: volts, kilovolts, and millivolts. 2. Know common power supplies and some voltage values. 3. Will be used..
"Measuring Voltage" Understanding Circuit PPT Courseware 5:
"Measuring Voltage" Understanding Circuits PPT Courseware 5 A colored light bulb requires a voltage of 22V when it glows normally. They are connected to a 220V household circuit. How should they be connected to make the circuit work safely? In a series circuit, the total voltage across the circuit is the same as the voltage across each part of the circuit..
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Update Time: 2024-08-12
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