"Measurement of Voltage" PPT courseware download

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"Measurement of Voltage" PPT courseware download

Part One: Voltage

1. Voltage causes free charges in the circuit to move directionally to form current.

2. The power supply is a device that provides voltage.

3. The symbol for voltage: _____.

4. The main international unit of voltage: _____ Abbreviation: _____,

Symbol: _____.

Commonly used units: kilovolts (kV) millivolts (mV)

Conversion relationship: 1kV=1000V 1V=1000mV

Voltage measurement PPT, Part 2: Voltage measurement

1. Instrument for measuring voltage: voltmeter

2. Symbol of voltmeter:

What information can you gain by looking at the external structure of a voltmeter?

Symbol of the table, three terminals, scale, pointer, two ranges

What is the relationship between the readings of the two ranges?

3. Structure of voltmeter:

Measuring range

voltmeter symbol

4. Instructions for using voltmeter:

① When measuring voltage, the range of the voltmeter must be correctly selected.

② When measuring the voltage of a certain part of the circuit, the voltmeter must be connected in parallel with this part of the circuit.

③ Connect the "+" terminal of the voltmeter to the end connected to the positive pole of the power supply, and the "-" terminal to the end connected to the negative pole of the power supply.

Voltage measurement PPT, the third part: exploring the rules of voltage in series circuits

In the diagram below, two light bulbs are connected in series to a circuit. So what is the possible relationship between the voltage UAB across L1 and the voltage UCD across L2 in the circuit and the total voltage UAD across L1 and L2?

Plan and design experiments

Connect the voltmeter to the two ends of L1 and L2 in the figure to measure the voltage, and then measure the total voltage at both ends of L1 and L2 to see what is the relationship between the measured voltages?

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.

Voltage measurement PPT, part 4: practice

1. Fill in the appropriate letters in the circles A and B of each circuit diagram in Figure 4-57 to represent different electricity meters, and mark the positive and negative terminals in the diagram.

2. Connect the circuit components in the picture below to form a circuit. It is required that the two light bulbs are connected in series, the voltmeter can measure the voltage across the lamp L1, and the ammeter can measure the current through the lamp L2.

Homework

1. During the experiment, it was found that the following situations occurred in the voltmeter. Try to analyze the reasons.

(1) The pointer deflects to the left:

(2) The pointer deflection angle is too small:

(3) The pointer quickly reaches the far right of the dial:

2. In the circuit below, if the reading of voltmeter V is 14V and the reading of voltmeter V1 is 8V, then what should the reading of voltmeter V2 be?

Keywords: Zhejiang Education Edition eighth grade science PPT courseware free download, voltage measurement PPT download, .PPT format;

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"Measurement of Voltage" PPT download:

"Measurement of Voltage" PPT download Part 1: Review: 1. What is the reason why metal conductors conduct electricity easily? There are a lot of free charges in a conductor. 2. After the metal conductor is connected to the circuit to form a path, why is there current in the circuit? It's the freedom in the wire...

"Measurement of Voltage" PPT courseware:

"Measurement of Voltage" PPT courseware Part One: Classroom Experiment Experiment: Follow the circuit diagram as shown in the figure and connect the circuit with wires. [Demonstration] The light bulb lights up, indicating that current is generated in the circuit. Thinking 1. How is electric current formed? 2. Didn’t do it..

"Measurement of Voltage" PPT:

"Measurement of Voltage" PPT Part 1 Content: Experimental Exploration When the switch is closed, does the ammeter read? How do free electrons move when the power supply is not connected? Will there be current? When there is no power supply connected to the circuit, these charges cannot produce directional displacement...

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Update Time: 2024-10-23

This template belongs to science courseware Zhejiang Education Edition Eighth Grade Science Volume 1 industry PPT template

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