The effect of electric current on the human body presentation. What is dangerous electric current. Basic rules for saving electricity

"Bus Hijack" - Religious terrorists use violence for purposes they believe are divinely determined. Hamas. Al Qaeda. Religious terrorists. The story of the capture of children thundered throughout the country. terrorist nationalists. Hezbollah. El Jihad. Types of terrorism. Aum Shinrikyo. Terrorist acts. The story of the capture of children.

"Poisonous Plants" - When poisoned by the berries of the crow's eye, nausea, vomiting, and abdominal pain occur. The stem of the hemlock is covered with a bluish bloom and red-brown spots. Anchar is a very tall (up to 40 m) tree. People who are poisoned by henbane come into a violent state. The height of wild rosemary is 50-120 cm. Henbane, even in small doses, can be toxic.

"Dangerous plants" - May lily of the valley (berries are dangerous). Cassia (all parts of the plant are dangerous). Philodendron (all parts of the plant are dangerous). Lantana (all parts of the plant are dangerous). Adenium obese (dangerous milky juice). Brovallia (all parts of the plant are dangerous). Tulip bulbs. Aglaonema (all parts of the plant are dangerous, cell sap is poisonous). Cineraria - ragwort (all parts of the plant are dangerous).

"Stranger" - Don't linger on your way home from school. Life and health are more precious than anything. Don't get into a conversation with a stranger. What should be done on the street in order not to become a victim of a crime? Approaching the house, look around, prepare the keys in advance. When leaving the house, securely lock the windows and doors. Don't play outside after dark.

"Rules of conduct on the water" - MOU SOSH s.Sofiiskoe. Rules for safe behavior on the water. OBZh teacher Elena Leonidovna Yakovleva. Use of rescue equipment. One of the main reasons is the inability to swim, the inability to stay on the water. Basic rules of behavior when swimming. Be careful when approaching a drowning person. Safety measures in the operation of watercraft.

“Ice Strength" - If after 2-3 hits with a stick on ice, water does not appear, then the ice is reliable. Rules of conduct on ice. The size of the ice under a single pedestrian with a load is at least 7 cm. If the victim is conscious, drink hot tea or coffee. It is undesirable to walk on the ice at night. Do not approach anglers closer than 3 meters.

In total there are 8 presentations in the topic

"Electric current in gases" - In the world industry, about 90% of tool steel is smelted in electric arc furnaces. Arc discharge. Types of independent discharges. Smoldering discharge. Electric current in gases. Electric current in gases Discharges and types of discharges in gases. The corona discharge is accompanied by a weak glow and little noise.

"Tasks for electric current" - Quiz. Current work. Terminological dictation. The purpose of the lesson: Basic formulas. Tasks of the first level. Lesson in physics: a generalization on the topic "Electricity". Tasks. Voltage. Electricity. Tasks of the second level. Current strength. Resistance. 2. There are two lamps with a power of 60W and 100W, designed for a voltage of 220V.

"Electric current in metals" - What is electricity? Table of contents. The scheme of the experiment of Tolman and Stewart is shown in the figure. Superconductivity. The total charge flowing through the circuit was measured by the deflection of the galvanometer needle. potential barrier. Superconductivity is observed not only in elements, but also in many chemical compounds and alloys.

"Direction of electric current" - The action of the current. Electric current has a certain direction. So, the magnetic needle near the current-carrying conductor rotates. Electricity. An electric current is called an ordered (directed) movement of charged particles. If the current strength does not change with time, then the current is called constant.

"Lesson Electric current" - Random movement of free particles. U - voltage. I got it. S - area cross section, units P is the specific resistance of the substance, units. measurements. Conductor resistance depends on: L – conductor length, units. measurements 1m. Measurements 1m2. The movement of free particles under the action of an electric field.

"The action of the electric current" - Formulate a hypothesis about the alleged action of the current. (Kant Immanuel German philosopher, 1724 - 1804). Select the experiment equipment on the demonstration table according to the picture. Draw a circuit diagram. What is the source of the earth's magnetic field? Do an experience. A moment of rest. "Report-story".

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"Class on life safety. Selivanov"

Lifestyle lesson

Selivanova Svetlana Anatolievna

Primary classes

"Electricity"

Target:

Familiarize students with the rules for using electrical appliances.

Tasks:

To expand students' knowledge about the variety of electrical appliances used in everyday life.

Familiarize yourself with the rules for using electrical appliances.

Develop logical thinking.

Build information skills.

Lesson progress

Conducting an experiment.

If you rub a pencil on a piece of woolen cloth, then bring it to small pieces of paper laid on the table, we will see .... What is this phenomenon?

(action of electricity)

Topic message.

The word "Electricity" is a Greek word and means amber. Even in ancient times, the Greek mathematician Thales had an idea about electricity. By rubbing an amber wand against wool, he seemed to charge it with static electricity. Brought to the head, this wand attracted the hair. We have received such electricity ourselves.

But this electricity is called static because it only accumulates in various objects. It cannot be transmitted over a distance and used in lighting fixtures.

Later, scientists found that electricity is a stream of tiny charged particles - electrons. Each electron carries a small charge of energy. But when there are a lot of electrons, the charge becomes large and an electric voltage arises. This is why electric current can travel long distances through wires.

Independent work in groups. Find the answer to the question:

How does electricity come to your home?

Story(handout on tables)

To transfer electricity to where it is needed, power lines are built. You, of course, saw high pillars outside the village - supports, to which wires are attached. Through these wires, electricity from power plants comes to different cities and towns.

Electricity flows through wires high voltage reaching hundreds of thousands of volts.

So that no one could even accidentally touch the wires, they are suspended high in the sky on special supports. And so that lightning does not strike the wires, a special wire is hung over them - lightning rod.

You can see it at the very top of the pillar.

When electricity comes to the city through wires, it goes to electrical substation. There is a special car - transformer.

Never touch a cable that is sticking out of the ground, because it may be under high voltage!

Electricity comes through the cables to the transformer box, which stands near the houses in your village. The small transformer in it lowers the voltage even more, so that the electricity can now be used in various appliances that are in your home.

How does electricity come to your home?

Why are the pillars so high?

What rule did you learn from reading the story?

(Discussion.)

What appliances in your home can use electricity?

Crossword "Electrical appliances"

Only me, only me

I'm in charge of the kitchen.

Without me, no matter how hard you work,

Sit without lunch. (electric stove)

He willingly inhales the dust,

Not sick, not sneezing. (vacuum cleaner)

On the table, in a cap,

Yes in a glass bottle

A friend settled

Cheerful spark. (lamp)

Look at my barrel

The top is spinning in me

He doesn't hit anyone.

The cream will knock you down quickly. (mixer)

pull themselves apart

Not radio, but says

Not theater, but shows. (TV)

What was the keyword? (dangerous)

When you press the switch of a lamp or some device, the electric current coming from the generator begins to flow through the wires and the device starts to operate, and the light bulb glows.

If the wires fail, the electricity becomes dangerous. A person can accidentally touch a bare wire, and he will be shocked. Wires can be connected and a short circuit or even a fire will occur.

Therefore, if you see a bare wire or a faulty switch, an outlet, immediately tell an adult about it.

Everything that runs on electricity must be serviceable!

If the TV or vacuum cleaner smells of burning, if sparks are visible, you must immediately unplug the wire from the outlet. This device needs to be repaired.

Can you repair faulty electrical appliances yourself?

You need to know how to handle electricity!

What should never be done?

Remember, electricity does not like being near water.

Discuss pictures on slides. (We draw our own conclusions)

Several electrical appliances are on the table.

Consider them carefully and determine which electrical appliances cannot be used.

(discussion)

Outcome.

Let's repeat once again what rules for using electrical appliances.

What have we learned about electricity?

Why is it dangerous? How to avoid trouble when interacting with electricity?

Reflection

Today in class I (me) ....

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"electricity. Selivanova"

MS (K) OU "B-Usinsk special (correctional) boarding school of the 8th type"

Primary classes

S.A. Selivanova

How do electrical appliances work?

I run along the paths, I can't do without a path. Where the guys don't have me, The light won't turn on in the house To distant villages, cities Who walks along the wires? Bright Majesty This is ELECTRICITY!

Bubbling water flows in the river,

Electric current flows through the wires.

Goes, runs, flies to help us

Cook dinner, vacuum the floor, sofa.