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Why the temp of metallic wire rises when a current passes through it?
Wiki User
∙ 13y ago
When current is passed through the wire, the negatively charged electrons (Current) face resistance as the molecules of the conductor block their way. These moving electrons collide with the molecules of the conductor and heat is produced which heats up the metallic wire.
Wiki User
∙ 13y ago
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Why does a spiral rotate when suspended over a lighted candle?
The flame from the candle produces heat which rises as a current of air. When the current of air hits the spiral and passes through, the sprial acts like it was in wind, and turns.
Which is visible evidence of energy passing through water?
A wave is a good example of energy passing through water, and it is clearly visible. The crest of the wave represents the point of peak energy content, according to Bernoulli.There are other ways that energy passes through water, but these are not clearly visible. For example, when water is heated it rises because of the reduced density compared to the colder water.
How are nuclear reactions controlled in power plants?
A nuclear reactor is a device in which nuclear chain reactions are initiated, controlled, and sustained at a steady rate. The heated water rises up and passes through another part of the reactor, the heat exchanger. The moderator/coolant water is radioactive, so it can not leave the inner reactor containment. Its heat must be transferred to non-radioactive water, which can then be sent out of the reactor shielding. This is done through the heat exchanger, which works by moving the radioactive water through a series of pipes that are wrapped around other pipes. The metallic pipes conduct the heat from the moderator to the normal water. Then, the normal water (now in steam form and intensely hot) moves to the turbine, where electricity is produced.
Why does steam Rise off a lake in the winter?
Because the Temperature of the water is warmer than the surrounding air and is evaporating. As the warm air rises it condenses as it passes the dew point.
How does heat transfer through convection?
Think of a pot of boiling water. The burner makes the heat, the heat rises, and the cold water replaces it, then the cold water gets hotter and rises. It's a cycle
Why does a spiral rotate when suspended over a lighted candle?
The flame from the candle produces heat which rises as a current of air. When the current of air hits the spiral and passes through, the sprial acts like it was in wind, and turns.
When the heated part of the mantle rises through the cooler part is an example of what?
A rising convection current.
What river is the most important in Europe it rises in Germany and passes along or through six other countries on its way to the black sea?
The Danube
Does the resistance of heater coil remains same when current flows through it?
Typically resistance rises with temperature.
Does resistance of heater coil remains same when current flows through it?
Typically resistance rises with temperature.
The what river is perhaps Europe's most important river it rises in Germany and passes along or through six other countries on its way to the Black Sea?
danube
How does coal burning create energy?
the heat from the burning coal heats water which rises through a tube making a current and turning turbines
When warm air rises and cool air sinks what current is created?
Convection current
When the heated part of the mantle rises through the cooler parts this an example of?
Convection
What kind of current is convection?
heat rises and cold desends
Which river rises through India and journeys through Pakistan?
The Indus River rises in India and travels to Pakistan.
What do filaments do inside a light bulb?
It passes an electric current and its temperature rises to about 3000 degrees C so that it is white-hot and gives off light. Unfortunately this type of bulb also produces a lot of heat, which is just wasted power.
