Yes, the current in the electric wire travels at the speed of light. When you turn it on, it seems to be there instantly. It does take time. Take the microwaves that are beamed up to the satellites orbiting in a fixed earth orbit. It takes time to travel out the wires to the satellite dish. It takes time for the microwaved picture and audio to travel out to the satellite, and back. That is why there is a pause when someone is transmitting live from the other side of the earth. They are asked a question, and they have a pause till they receive the question, and can answer it. Yes when you flip the light switch, it takes time for the current to reach the light bulb. BUT if you think the current will not get there to the end of the wire you are working with, you are in for a big surprise. Remember the ELECTRIC chair is used to end the life of convicted criminals. A defibrillator is used to stop your heart when it is beating at the wrong time, and hopefully when it starts again it will beat in rhythm.
A small computer is inserted under the skin with wires leading to your heart to shock it to beat in rhythm. Has been for a number of years. Think pacemakers! My veins in my legs were bulging, hurt and looked awful. A technician made a small incision in my groan, stuck wire in and put it into my bad vein. When they had it where it belongs, they sent a radio wave down the wire, killing the bad vein. The Doc said a new vein would form and take over. They do not scrape the veins anymore. In years to come will body parts be replaced by electrical ones?? At night we just plug in to recharge?? You can buy a small tens unit to put on your sore muscles so a battery can send electrical stimulation to soothe them!
There is electrical stimulation to nerves, and to your brain for medical help. Your body functions with electricity. Your nerves act as wires. When the insulation breaks down and short circuits the wires it is called multiple sclerosis. Muscles are activated by electrical impulses from the brain. Your muscles store what you do over and over. The muscles act without impulse from your brain. Muscle memory. Your heart is given stimulation for every beat. We measure this by EKG. Your brain stores memories by electrical charges. They put an electronic bypass in your spine where the nerves(wires) are broken and allow the nerves to carry messages to your arms and legs again. How long before we have a computer for a brain like in the Disney movie?? How soon will we have the six million dollar man and woman?? Sooner than you think!!
Your microwave oven sends out radio waves, they excite the water molecules in the food. The vibrating molecules create heat. And your frozen dinner is defrosted and cooked in minutes. How microwave cooking was discovered was by a technician working on radar during the second world way. They were looking for a way to see airplanes by bouncing radio waves off the metal plane and the signal coming back to the dish that sent it out. Microwave cooking started because the technician working on the radar dish had the chocolate bar in his pocket melt. That is why the first units were called radar ranges.
You can buy electrical heating and cooling units that use electrical energy instead of chemicals (freon) for the heat transfer. I have a 12 volt heat and cool unit that I can put a six pack of soft drinks in. You plug it into the cigarette lighter socket in your car. Someday our refrigeration and air conditioning systems will be electrical instead of freon which is bad for the atmosphere.
I am telling you this, so you can understand the electricity circuits in your house. Learn how electricity works, and you can understand the miracles of the human body too. All around us is electricity. Think lightning! And the static charge you get from your carpet!!
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