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Why is it essential to earth electrical appliances having metallic body?
if the appliance shorts out (if one or more of the wires inside it come into contact with the outer casing) the electricity will take the shortest route to be neutralised. If there is no earth wire and you touch the shorted out appliance then the shortest route to neutralise the electric charge is through you, and you will be electrocuted. If an earth wire is present then the shortest route to neutralise the current will be through this wire, so you would not be electrocuted if you touched the shorted out appliance.
Can solids cause pressure?
Yes, solids can exert pressure on the surfaces they come into contact with due to their weight or force applied. This pressure can vary depending on the amount of force exerted and the contact area with the surface.
What results when rocks come in contact with molten rocks such as those in an igneous intrustion?
When rocks come in contact with molten rocks from an igneous intrusion, the surrounding rocks may undergo contact metamorphism, where their mineralogy and texture are altered due to the heat and chemical reactions with the intruding magma. This can result in the formation of new minerals and textures in the rocks near the intrusion boundary.
Where do dynamic contact and regional metamorphism occur?
Dynamic contact metamorphism occurs along tectonic plate boundaries where rocks come into contact with hot magma intrusions, while regional metamorphism occurs over large areas along convergent plate boundaries where high pressure and temperature conditions alter rocks deep within the Earth's crust.
Microwelds are formed where?
bumps from two surfaces come into contact.
Bats cannot touch electrical wires?
False. Bats are capable of avoiding electrical wires while flying, as they use echolocation to navigate their surroundings. However, if a bat were to accidentally come into contact with an electrical wire, it could potentially be electrocuted.
How come birds can land on power lines without being electrocuted?
The high voltage is between one wire and the other. From one point on the wire to another point on the same wire, the voltage is quite insignificant. As long as the birds don't touch both wires, nothing much will happen. The wire does not have a difference in voltage from foot to foot. The term "high voltage" refers from wire to ground. Electricity flows down a voltage gradient. There is no gradient of voltage between the feet.
How come birds on electric wires dont get electrocuted?
For an electric current to pass through the bird's body, there must be a potential difference (voltage) across its legs. But its legs are connected to a very good conductor which means that the bird's legs must be at the same potential -no potential difference, no shock!
How come birds on electric wires dont get electroucuted?
They are not grounded. Electricity is going to take the shortest route possible and with the least resistance...therefore it is "easier" for the electricity to travel in a straight line through the metal cables than to travel up and back down again through a bird which is not conductive. If you were to hang from a power line (assuming you didnt come close to another one) you would not be electricuted, only if you touch the ground or another wire or pole will you get zapped.Answer The resistance of the wire between the bird's feet is so low that the current passing through the conductor cannot create sufficient voltage drop to harm the bird. Should part of the bird come into contact with another line conductor, or an earthed conductor, then it will be killed.
Why do birds not electrocuted when they are staying on live wire or wires?
Power lines are insulated and as long as they don't touch the ground (or another object) they won't be electrocuted.AnswerMost power lines are not, in fact, insulated because they are already surrounded by an insulating media -air.The reason that birds don't get electrocuted is because each foot is at the same potential and, for current to flow (it's the current which causes electrocution) through its body, each foot must be at a different potential. The bird is safe, providing another part of its body doesn't come in contact with one of the other conductors.
Why do birds not get electrocuted when they sit on the third rail?
In order for someone to be electrocuted by a live power line or 3rd rail on the train they must also be in contact with ground, or close enough for the power to jump to ground on it's own. That is also why they can sit on a power wire, the insulators at the poles keep the power from reaching ground. High voltage transmission lines can be repaired by a helicopter crew. There is a strict procedure to follow though. The helicopter hovers close to the wire and a ground between the helicopter and the wire is established by making contact with the wire through a high voltage probe. Once that occurs, the operator hooks a clamp to the wire for a permanent connection. At this point, the operator can touch the wire and repair it without getting shocked. When done, the reverse procedure is followed exactly.
Do ants eat electric wires?
No, ants do not eat electric wires. They are not attracted to the materials in electric wires and are more interested in foraging for food sources such as plants, other insects, or sugary substances. However, they may come into contact with wires while exploring their environment.
What type of energy does a bug zapper use?
A bug zapper typically uses electrical energy to attract and zap insects through the use of UV light and electric grids. When insects come into contact with the grid, they are electrocuted and killed.
Where does penguin birds come from?
They come the same way all other birds come from. An egg.
When do Siberian birds come to India?
Siberian birds come to India during winter.
How do you say the birds come out in February in french?
How do you say the birds come out in february in french?
Is newpaper ink toxic to birds?
Well this really depends on how you suppose the Birds come into contact with it... If the bird is drinking it then it's more poisionous than toxic... but if you say that the bird is inhaling the air which has been near a newspaper, i am almost definite that the birds would be unharmed...
