"Current and Circuit" PPT Courseware 4

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"Current and Circuit" PPT Courseware 4

Electricity is widely used and is so important in production and life. So, how is electric current formed? What is the basic structure of a circuit?

Electric current: The directional movement of charges creates an electric current

In physics, the direction of directional movement of positive charges is defined as the direction of current; in the external power supply, the current flows from the positive electrode to the negative electrode.

Circuit: A current path formed by connecting power supplies, electrical appliances, and switches with wires.

Things you should pay attention to when connecting the circuit correctly:

①No short circuit

②The switch should be turned off when connecting the circuit

③ Check that the connection is correct before closing the switch.

1. Current:

1. Formation: directional movement of charge

2. Circuit

The circuit is composed of ______, ______, ______, ______.

3. Direction of current

It is stipulated that the direction of directional movement of positive charges is the direction of current.

Power supply: a device that can continuously provide electrical energy to electrical appliances

Such as: dry batteries, storage batteries, generators, etc.

Electrical appliance: A device that uses electrical energy to work.

On/Off: Control the work of electrical appliances.

Wires: Connect the above devices. Transmitting electrical energy

Requirements for drawing a circuit diagram:

(1) Use unified symbols to express.

(2) When connecting, draw the lines horizontally and vertically.

(3) Components cannot be drawn at corners (except varistor)

(4) The lines should be drawn concisely, neatly, beautifully and with reasonable layout.

Summary: Three states of the circuit diagram:

Path: A circuit with a switch closed and connected everywhere

Break: Also called an open circuit, a disconnected switch, or a circuit that is broken somewhere.

Short circuit: A circuit that is directly connected to the two poles of the power supply without passing through electrical appliances. A short circuit will damage the power supply and wires. Divided into two types.

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"Exploring the Laws of Current in Series and Parallel Circuits" Current and Circuit PPT Courseware 2:

"Exploring the Laws of Current in Series and Parallel Circuits" Current and Circuit PPT Courseware 2 Experience: Current Characteristics of Series and Parallel Circuits Experiment Preparation: Power supply, switch, wires, and two small light bulbs with different specifications. Activity 1: Connect two small light bulbs to form a series circuit (as shown in the picture)..

"Exploring the Laws of Current in Series and Parallel Circuits" Current and Circuit PPT Courseware:

"Exploring the Laws of Current in Series and Parallel Circuits" Current and Circuit PPT Courseware Connecting series circuits: Note: The switch must ____ when wiring to avoid short circuit. Question: The light bulb glows, which proves that _____ has passed. What is the direction of the current? Ask questions..

"Measurement of Current" Current and Circuit PPT Courseware 9:

"Measurement of Current" Current and Circuit PPT Courseware 9 Current 1. Current intensity: Indicates the size of the current. Current intensity is referred to as the current symbol I 2. The basic unit of current: ampere, referred to as ampere, symbol A. Common units: milliamps (mA) and Microampere (A) conversion relationship: 1A=..

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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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