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What is the effect on its resistance if a resistive wire is elongated?
Wiki User
∙ 11y ago
There are two ways to elongate a piece of wire: Either stretch it, or attach
another piece onto one end of it. Either way, the resistance will increase.
Wiki User
∙ 11y ago
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Examples of resistive heating?
In a toaster, the house current from the outlet passes through a wire with some resistance. Household electricity is supplied at a nominal 117 volts AC. If 'R' is the resistance of the wire in the toaster, then the power (heat) dissipated by the wire is E2/R = (117)2/R watts of heat. Notice that as long as the voltage remains constant, MORE resistive heat is dissipated from a SMALLER resistance.
What happens to resistance of the wire if the wire is short?
Short wire has less resistance Long wire has more resistance Thick wire has less resistance Thin wire has more resistance
Do bend in the wire effect the electric resistance?
The resistance is based on the cross sectional area. It is conceivable that you could bend a wire in such a way as to affect the cross sectional area, but unlikely.
Does the wire in the electrical cord of an electric kettle have a higher or lower resistance than the heating element inside the kettle?
The wire in the cord has much lower resistance than the heating element. The heating element is a resistive or resistance heating element. Resistance in the quality of a substance or material that causes it to limit current flow, and it get heated up in the process. The heating element has all but the smallest fraction of the resistance in the circuit, so the heat, that thermal energy that get the water hot, is generated by the resistance of the heating element.
Which would have the greater effect on vascular resistance?
decreasing the diameter of a blood vessel by ½by hussain :)
Does a 26 gauge wire have a lower resistive value than a 24 gauge wire?
If the wires are of identical materials, the 26 guage wire has more (higher) resistance.
Examples of resistive heating?
In a toaster, the house current from the outlet passes through a wire with some resistance. Household electricity is supplied at a nominal 117 volts AC. If 'R' is the resistance of the wire in the toaster, then the power (heat) dissipated by the wire is E2/R = (117)2/R watts of heat. Notice that as long as the voltage remains constant, MORE resistive heat is dissipated from a SMALLER resistance.
Construction and working of potentiometer?
1.In the potentiometer the resistive material used is may be resistance wire and carbon material. 2.This material is placed in the circular form both ends are open of the resistive wire,these ends are connected to external leads. 3. Then this resistive material encapsulated into the metal or plastic coatings. 4.The movable arm makes firm contact on the resistive material and its resistance is varry acordingly to theire contact positions.
How does increasing the wire gauge from awg 22 to awg 26 generally effect resistance?
Resistance will increase.
What factors effect the resistance of a wire?
Its elemental makeup. Its' diameter and its' length.
What will be the effect on specific resistance if length of wire is halved?
it will not effect it because it only depends upon property of medium
What happens to resistance of the wire if the wire is short?
Short wire has less resistance Long wire has more resistance Thick wire has less resistance Thin wire has more resistance
Do bend in the wire effect the electric resistance?
The resistance is based on the cross sectional area. It is conceivable that you could bend a wire in such a way as to affect the cross sectional area, but unlikely.
What is the Change in resistance of wire when its length is double?
Assuming the wire follows Ohm's Law, the resistance of a wire is directly proportional to its length therefore doubling the length will double the resistance of the wire. However when the length of the wire is doubled, its cross-sectional area is halved. ( I'm assuming the volume of the wire remains constant and of course that the wire is a cylinder.) As resistance is inversely proportional to the cross-sectional area, halving the area leads to doubling the resistance. The combined effect of doubling the length and halving the cross-sectional area is that the original resistance of the wire has been quadrupled.
If you wire up a circuit with very thin wire what effect might this have?
less current will flow as resistance is inversely proportional to area
Two ways resistance of a wire can be increased?
The resistance of a wire is determined by the following formula. R = (rho)L/A, where the greek letter rho (it looks like a p) is a value assigned to a material based on how resistive it is by nature, L is the length of the wire, and A is the cross-sectional area (AKA how thick the wire is). Increase the length, or change the material to something with higher restistivity. Hope this helps!
What is the effect on current in a wire if both the voltage across it and its resistance are doubled?
it will cause a Short Circuit
