"Voltage" Voltage Resistance PPT Courseware

Description

"Voltage" Voltage Resistance PPT Courseware

learning target

1. Know what voltage is and the unit of voltage.

2. Master the use of voltmeter.

Self-study guidance

Please read the contents on pages 55-58 of the textbook carefully and think about:

1. The role of power supply.

2. Units and relationships of voltage.

3. How to connect the voltmeter.

4. Understand the range and graduation value of the voltmeter.

5. Voltmeter reading.

After 5 minutes, compare those students who can recite the answers to the above questions and answer the test questions correctly.

1. Voltage:

1. Voltage: The physical quantity that causes current to flow in a circuit.

Voltage supply device - power supply

Conditions for obtaining continuous current

There is voltage

closed loop

Summary: power supply - voltage - current

2. Voltmeter:

1. Function: An instrument that measures the voltage across the circuit. (read instructions)

2. Symbol: V

3. Measuring range and graduation value

3. Correct use of voltmeter

1. The voltmeter should be connected in parallel at both ends of the circuit under test;

2. The voltmeter must allow current to flow in from the "+" terminal of the voltmeter and out from the "-" terminal;

3. The measured voltage should not exceed the range of the voltmeter; (the voltage cannot be estimated in advance, use the test method)

4. The voltmeter can be directly connected to the positive and negative poles of the power supply, and the measured indication is the voltage of the power supply.

4. Thinking:

The voltmeter can be directly connected to the positive and negative terminals of the battery, and the measured value is the voltage of the battery. So, are the voltages of two batteries and one battery the same?

5. Practice:

1. In the three circuits shown in the figure below, which bulb's voltage is measured by the voltmeter?

Voltmeter measuring L2

voltage across

3. Connect the components in the picture below (use pencil lines to represent wires). The bulbs L1 and L2 are connected in series. The voltmeter V1 measures the voltage at both ends of L1. V2 measures the total voltage after L1 and L2 are connected in series, and draw the circuit diagram.

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For more information about the "Voltage Voltage Resistance" PPT courseware, please click the Voltage ppt Voltage Resistance ppt tag.

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Update Time: 2024-11-22

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

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