Закон Кулона: презентация к открытому уроку физики

8 TH CLASSES PHYSICS

Reception "Say hello to elbows."

Descriptor:

• Each "number one" folds the hands behind the head so that the elbows are pointed in different directions;

• Each "number two" rests with hands in the hips so that the elbows are also directed to the right and left;

• Each "number three" bends forward, puts his hands on his knees and expose his elbows to the sides.

The name of the groups is "1", "2", "3".

II. Learning new material.

2.1 Conducting experiments. Objective: to develop practical skills and skills in conducting the experiment .

1 experience: Equipment: air balloon; Woolen fabric, polyethylene strips, paper strips.

 Take the air ball and rub it on the wool.

 Hold the ball to the paper strip. What do you observe? Describe your observations.

 Bring a loaded paper strip to the polyethylene strip, to a paper not loaded strip. Describe your observations. Make a conclusion. (What are the charged bodies, where is the electric charge located? What is called electrization ?)

2 experience: Equipment: с omb plastic, с lean-washed head

A clean-washed head, comb several times with a plastic comb, what do you observe if you carry the comb to your hair?

2.2. Speech students with demonstrations. Students draw conclusions from observations.

Competence: informative, reflective

Objective: to develop to contribute to a clear formulation of their actions, to include knowledge and methods of action in the knowledge and methods of action already available to the system;

2.3. With the help of the presentation conclusions are summarized. Records are made in the notebook.

Competences: information, technological

The goal: to develop help to clearly formulate your thoughts.

Model Answer:

1. Electrification is ...

2. There are two types of electric charge: ...