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Electrical resistance increases because the density of charge carriers decreases with increased temperature. High temperature resistivity is predominantly characterized by collisions between electrons and metal atoms. Decreasing the density of charge carriers increases resisistance.
Wiki User
∙ 14y ago
Wiki User
∙ 15y agoP=VI Watts
=I²R
=V²/R 1Joule = 1W*seconds
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What is resistance welding?
Arc. It's where electrical resistance is used to create the heat for the welding process.
Why is heat observed when current flows through the circuit?
The heat observed in a circuit is the result of electrical resistance.Under normal circumstances, every electrical circuit has a certain amount of resistance to the flow of electricity. Electronflow opposed by the physical nature of the conductor. This is the fundamental nature of electrical resistance. Whenever this happens, the energy of those electrons is absorbed by the conductor (as opposed to flowing through) which then emitts this captured energy as heat. The higher a conductor's resistance, the more electrical energy is converted to heat by it.
How does electric resistance relate to energy transformation?
Power in a circuit is inversely proportional to the resistance, all other things being equal. Voltage equals amperes time resistances, so amperes equals voltage divided by resistance. Watts equals voltage times amperes, so watts equals voltage squared divided by resistance.
What elements in a curcuit can change eletrcical energy into other forms of energy?
Resistance converts electrical energy into other forms of energy, such as light, heat sound, motion, and magnetic effects.
Why is less resistance for a conductor wire good?
Resistance in a wire restricts the movement of the electrons through the wire. This restriction transfers some of the energy contained in the electrons into the material of the wire and as this energy accumulates in the material of the wire the wire starts to heat. Therefore, there the energy that is transferred into the wire material is considered wasted because it is not available as electrical energy, which means the consumer who is using that wire is charge for the electrical energy that is waste. It the resistance is less in that conductor the consumer will save money.
What does an electric blanket covert electrical energy to?
Heat. Electric blankets are simply a resistance coil, which convert electrical energy to heat.
What is the name for an electrical load that converts electrical energy into heat energy?
A Resistor or Resistance
Wires with high resistance change electrical energy into what?
Heat.
What is resistance welding?
Arc. It's where electrical resistance is used to create the heat for the welding process.
When current passes through a conductor what makes the conductor heat up?
The electrical resistance of the material. All materials have some electrical resistance except for superconductors.
Examples of electrical resistance?
Good examples of electrical resistance would be an electrical baseboard heater, electric hot water tank and an electrical kettle. All of these devices use a resistive element to create heat.
Why is heat observed when current flows through the circuit?
The heat observed in a circuit is the result of electrical resistance.Under normal circumstances, every electrical circuit has a certain amount of resistance to the flow of electricity. Electronflow opposed by the physical nature of the conductor. This is the fundamental nature of electrical resistance. Whenever this happens, the energy of those electrons is absorbed by the conductor (as opposed to flowing through) which then emitts this captured energy as heat. The higher a conductor's resistance, the more electrical energy is converted to heat by it.
What is insulating material used for?
insulating materials have low thermal/electrical conductivity values and hence can be used in applications where resistance to heat or resistance to the passage of electrical current is required.
What is a substance that builds up energy from electricity causing heat?
Any substance that has an electrical resistance will convert electrical energy to heat - in other words, most substances. The exception are superconductors. A device specifically designed to dissipate electrical energy is called a resistor or resistance.
What makes a current lower and generates more heat?
The resistance of the electrical conductor, eg a wire, reduces the current which can flow in the circuit. The remaining current which does flow generates heat, representing the electrical energy which has been lost in overcoming the resistance.
Resistance in wires causes electrical energy to be converted to what energy form?
Most resistors convert electrical energy into thermal energy, which is often called heat.
A substance that builds up energy from electricity causing heat?
Any substance that has an electrical resistance will convert electrical energy to heat - in other words, most substances. The exception are superconductors. A device specifically designed to dissipate electrical energy is called a resistor or resistance.
