Birds don t get electrocuted, why don t birds get electrocuted?

The reason why the bird will not be electrocuted on the wire: because the bird is small, it only touches one wire (the bird's feet are on the same wire, and there is almost no potential difference between the two feet), its body and the wire it is standing on are equipotential, and there is no electric current passing through the body, so they will not be electrocuted.

Electric shock: It is caused by the direct contact of the human body with the power supply, and a certain amount of current passes through the human body, resulting in tissue damage, dysfunction and even death. The longer the electric shock, the more severe the electrical damage to the human body.

Lightning strikes in nature are also a form of electric shock, and their voltages can be as high as tens of millions of volts, causing extremely strong currents and extremely harmful electric shocks.

Because only one line was stepped on, there was no loop. The wires that make up the power grid have live wire and neutral line, when the bird stands alone on a certain kind of wire, the voltage of the two feet is the same, because the voltage is the same, there is no voltage difference, and at this time the bird and the wire do not form a closed loop, so it will not be electrocuted. It's not because there are special materials on the bird's feet, and the bird will still be electrocuted if it steps on the fire line and the neutral line respectively.

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Some birds also like to take a photo on the power lines before their seasonal migration. That's why, in late summer and early fall, you'll find wires packed with birds that are slowly preparing to start flying south together for the winter.

Labarr also said that many birds avoid higher power lines during the breeding season because it's like a single guy running to a bar, and it's hard to find a mate when you're surrounded by competitors.

However, electrical wiring does not prevent some birds from breeding time. "In the spring, male songbirds may perch on power lines and sing, which is better seen and heard by females," said Miyoko Chu from Cornell University's Ornithology Laboratory.

In other words, build on your strengths and avoid your weaknesses.

Bird standing on the wire will not be electrocuted because there is no pathway.

1. A layer of cuticle on the bird's feet, which has an insulating effect. The bird itself has resistance, and it is only equivalent to a small section of resistance at the bird's foot and connected a large resistor. The change in the resistance of the wire itself is negligible, and the current from the trunk circuit does not go away.

The equivalent resistance of the bird itself is connected in parallel on much less than its wire resistance, and only a negligible current will flow through the bird without posing a threat, and the result is that although the high voltage is very high, the voltage is concentrated on the load, and the voltage drop on the bird tends to be 0.

2. The bird is not electrocuted when standing on the wire because it only touches the fire wire or only touches the ground wire, and cannot produce a loop, so it does not conduct electricity, if it has one foot on the fire wire and one foot on the tower, it will definitely be electrocuted.

3. The formation of the current requires a current circuit, and it will not be electrocuted if it only touches a wire, but if the bird's body touches two wires at the same time or the bird standing on the wire grinds its mouth on an uninsulated pole or rack, there will be an electric current flowing through the bird, causing it to be electrocuted.

The two paws of the bird stand on the same wire.

The 220,000 volt high voltage LGJ steel-core aluminum stranded wire has a cross-sectional area of 95 mm2 and a permissible throughput current of 325 amperes.

If the distance between the bird's paws is 5 cm, the resistance of this 5 cm wire is only 1 63 10-6 ohms, and the voltage at both ends of the wire is U ir, which does not exceed 5 3 10-3 volts. This is the voltage applied to the bird.

If the resistance of the bird's body is 10,000 ohms, then the current through the bird's body is only 0 53 microamps. The current is very weak, so the bird will not be electrocuted.

An electric current that passes through a person's or animal's body to cause injury is called an electric shock. But we often see flocks of swallows, sparrows or pigeons, flying onto high-voltage power lines and standing and playing, but none of them are electrocuted. Why don't birds get electrocuted?

Let's do an experiment first, connect the small bulb and the battery pack according to the circuit shown in the diagram, you will find that the first bulb is on, but the second bulb is not. The reason is that the two "legs" of the first bulb are connected to the power supply, and the voltage is constantly passing through the bridge, thus forming an electric current. The electric current causes the filament to emit light and heat.

If you look at the two "legs" of the B bulb, you will find that it is "standing" on the same wire, and there will be no voltage falling on it, of course, there will be no current in the filament, and the beads will not emit light.

From this experiment, it is not difficult to see that the bird standing on the high-voltage line is very similar to the B bulb, standing on the same wire, and there will be no voltage between the two feet of the bird, and there will be no current passing through it, so the bird will not be electrocuted.

However, if a bird's body touches two wires at the same time, or if a bird standing on a wire grinds its beak on an uninsulated pole or rack, an electric current will flow through the bird and electrocut. Because of this, there is always a long insulated porcelain bottle between the iron frame and the wire that people fix the wires on the poles of high-voltage transmission lines, which can not only protect birds from electric shock, but also avoid power outages due to electric shocks of birds.

Because the bird has the same voltage between its feet and there is no potential difference, it will not be electrocuted. Even if a person has two feet on the same power line, and his body does not touch another wire or conductor, he or she will not be electrocuted. The reason is still the same:

There is no potential difference between the feet, and there is no electric current flowing through the human body without electric shock. But no one touches it for no reason, unless you're an electrician, and it's a job need. Some people say that it is wrong for a bird's foot skin not to be electrocuted if it does not conduct electricity.

There is also the problem of "step voltage, the bigger the step, the greater the voltage between the feet; The smaller the stride, the less voltage there is between the feet. Because the bird is small, the stride is too small, and the stride voltage is too small (negligible) to not be electrocuted" and so on are also wrong. Because the overhead wire only falls into the ground, so that the earth is electrified, the farther away from the wire, the lower the voltage, at this time, if people accidentally walk into the sun, then there is a potential difference between the two feet, this is the "step voltage", there will be a current flowing through the human body and electrocution.

The first aid is to carefully and slowly jump out of the electrified area with one foot. Because there is no potential difference in the one-legged human body, there will be no electric current flowing through the body and there will be no electric shock. This loss of Kailu is very important and must be noted.

The swallow stands on the high-voltage line, forming a closed loop between its feet and the high-voltage line.

Electric shock generally refers to a certain current flowing in the human or animal body, thereby causing certain damage to the organism, as long as there is no current in the body, it will not form an electric shock. There are two conditions for the generation of electric current, one is a closed loop, and the other is a potential difference (which can be compared to the flow of water from a high place to a low place), and the two conditions are indispensable.

The swallow stands on the high-voltage line, and the shape between the feet and the high-voltage line has become a closed loop, but the distance between the feet is too small, and the potential on the feet can basically be regarded as equal, and there is no potential difference, so there will be no current flowing through the swallow's body, and the electric shock will naturally not be formed.

Precautions for electrocution of birds:

Birds can stand on the high-voltage line is not that they are not afraid of electric shock, but there is no condition for electric shock, under certain conditions, they will also be dismantled by the slag, for example, the birds on the two lines will form an electric shock, but the probability of this phenomenon is very small.

The resistance of high-voltage wires is very small, while the resistance of humans or animals (including swallows) is much larger. In addition, the distance between the two feet of the swallow is small, and the resistance of the wire between the two feet on which it stands is even smaller, and the resistance ratio of the swallow's body can almost be ignored.