"The Laws of Voltage in Series and Parallel Circuits" Voltage Resistance PPT Courseware 4

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"The Laws of Voltage in Series and Parallel Circuits" Voltage Resistance PPT Courseware 4

Have you mastered it?

1. The voltmeter has ____ ranges: from 0V to 3V and from ____V to ____V. When the measuring range is 3V, the graduation value is ____V; when the measuring range is 15V, the graduation value is ____V.

2. Pay attention to the following when using the voltmeter:

1. When using a voltmeter, adjust ____ first.

2. The voltmeter should be connected ____ in the circuit.

3. Make the current flow in from the ____ terminal of the voltmeter and flow out from the ____ terminal.

4. The measured voltage cannot exceed the ________ of the voltmeter.

1. Explore the voltage rules of series circuits:

Observe and think about:

Now there are two light bulbs of different specifications connected in series. If the switch is closed, will both light bulbs glow? Is the brightness of the light the same?

Ask a question:

What is the relationship between the total voltage of a series circuit and the voltage across each electrical appliance?

Conjecture or hypothesis: (modeled after water pressure)

Conjecture 1: The total voltage in a series circuit is equal to the sum of the voltages at both ends of each electrical appliance.

Conjecture 2: The total voltage in the series circuit is equal to the voltage across each electrical appliance.

Design experiments and develop plans:

Connect the voltmeter to two points AB, BC, and AC in the circuit, measure the voltage, and see what is the relationship between them.

Replace the other two small bulbs and measure again to see if there is the same relationship.

Analysis and argumentation:

By analyzing the above experimental data, we can draw the following conclusions:

The total voltage in a series circuit is equal to the sum of the voltages across each consumer.

2. Explore the voltage rules of parallel circuits:

Design experiments and develop plans:

Connect the voltmeter to both ends of L1, L2 and the power supply respectively, measure the voltage and see what is the relationship between them.

Replace the other two small bulbs L1 and L2 and measure again to see if there is the same relationship.

Please use the picture on the left to draw the circuit diagram for measuring the voltage across L1, L2 and the power supply on the study plan.

Evaluate:

1. During the experiment, why do we need to conduct multiple experiments using light bulbs of different specifications?

2. It is troublesome to repeatedly connect the voltmeter in this experiment. Can you make suggestions for improving the experiment? (Can be accompanied by circuit diagram description)

---Class Summary---

1. Voltage rules of series circuits:

The total voltage in a series circuit is equal to the sum of the voltages across each consumer

The letter expression is: U=U1+U2

2. Voltage rules of parallel circuits:

The voltages at both ends of each branch of a parallel circuit are equal and equal to the total voltage across the power supply.

The letter expression is: U1=U2=U

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For more information about the PPT courseware "Voltage Rules of Series and Parallel Circuits with Voltage and Resistors", please click on the Voltage Rules of Voltage in Series and Parallel Circuits with Voltage and Resistors ppt tag.

"Laws of Voltage in Series and Parallel Circuits" Voltage Resistance PPT Courseware 6:

"Laws of Voltage in Series and Parallel Circuits" Voltage Resistance PPT Courseware 6 Observe and think about two light bulbs of different specifications connected in series. When the switch is closed, will both lights shine? Is the brightness of the light the same? Ask a question 1. Why do the two lights emit light differently? 2. series connection..

"Laws of Voltage in Series and Parallel Circuits" Voltage Resistance PPT Courseware 5:

"The Laws of Voltage in Series and Parallel Circuits" Voltage Resistance PPT Courseware 5 Review questions: 1. What are the laws of current in series circuits? The current in a series circuit is equal everywhere. Formula: I=I1=I2 2. What are the rules of the current in a parallel circuit? Main circuit current in parallel circuit, etc..

"Laws of Voltage in Series and Parallel Circuits" Voltage Resistance PPT Courseware 3:

"Laws of Voltage in Series and Parallel Circuits" Voltage Resistance PPT Courseware 3 Observe and think about two light bulbs of different specifications connected in series. When the switch is closed, will both lights shine? Is the brightness of the light the same? Ask a question 1. Why do the two lights emit light differently? 2. series connection..

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Update Time: 2024-07-29

This template belongs to Physics courseware People's Education Edition Ninth Grade Physics Complete Book industry PPT template

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