- Why is there less resistance in a thicker wire?
- What is a bad resistance reading?
- Does a bulb have resistance?
- What happens if there is not enough resistance in a circuit?
- Does the length of wire affect voltage?
- Can you have zero resistance?
- What happens to resistance in a wire as the wire becomes thinner?
- What type of wire has the lowest resistance?
- How do you reduce resistance in a wire?
- What affects the resistance of a wire?
- Why does the length of wire affect resistance?
- Which has more resistance 100 watt bulb or 60 watt bulb?
- What type of wire has the most resistance?
- Does thicker wire carry current?
- What causes low resistance in a circuit?
- Why is the resistance not constant in a light bulb?
- What is the resistance of a 12v 21w bulb?
Why is there less resistance in a thicker wire?
A thicker conductor has more parallel paths for electrons to flow at the same time.
So the resistance to electron flow is less..
What is a bad resistance reading?
While you may not know exactly what the resistance of your particular motor should be, you do know that it should be more than zero! A resistance measurement of less than .5 ohms usually indicates a short circuit in the motor winding.
Does a bulb have resistance?
The filament in an incandescent bulb does not have a constant resistance. If you take a bulb and increase the voltage across it, the current increases too. An increase in current means the bulb gets hot—hot enough to glow. As the temperature increases, however, the resistance also increases.
What happens if there is not enough resistance in a circuit?
If there really were no resistance in the circuit, the electrons would go around the circuit, and arrive back at the beginning of the circuit with as much energy as the potential difference (the voltage). That final energy is usually what is dissipated as heat or other types of energy by the circuit.
Does the length of wire affect voltage?
This voltage drop occurs because wires have resistance. Long lengths of wire have more resistance than short lengths. Thus, long lengths of wire will cause a larger voltage drop than shorter lengths.
Can you have zero resistance?
Possible it is! The state of zero electrical resistance is called superconductivity, and it can be induced in many materials by cooling them to very low temperatures. … The state of zero electrical resistance is called superconductivity, and it can be induced in many materials by cooling them to very low temperatures.
What happens to resistance in a wire as the wire becomes thinner?
The resistance of a thin wire is greater than the resistance of a thick wire because a thin wire has fewer electrons to carry the current. The relationship between resistance and the area of the cross section of a wire is inversely proportional .
What type of wire has the lowest resistance?
SilverSilver has the lowest resistivity. That means for a given length and diameter of wire it will also have the lowest resistance. But its not used for wire very often because its only marginally better and it is expensive and corrodes easily.
How do you reduce resistance in a wire?
To reduce resistance increase its cross section, make it shorter and reduce its temperature or change to a material that has a lower resistivity if you can. Some metals will become super conductors at temperatures near absolute zero.
What affects the resistance of a wire?
(1) Length: the length of the wire will affect the resistance. The longer the wire, the higher the resistance. (2) Thickness: the thickness of the wire will affect the resistance. The thicker the wire, the lower the resistance.
Why does the length of wire affect resistance?
First, the total length of the wires will affect the amount of resistance. The longer the wire, the more resistance that there will be. … After all, if resistance occurs as the result of collisions between charge carriers and the atoms of the wire, then there is likely to be more collisions in a longer wire.
Which has more resistance 100 watt bulb or 60 watt bulb?
60W bulb has higher resistance than 100W bulb. It is because power is written on the bulb assuming that voltage is same (say for example 230V). Therefore according to formula P = V^2/R, lower the power rating higher will be the resistance. … 60 W bulb resistance = 60/230^2 = 0.00113 ohm.
What type of wire has the most resistance?
NichromeNichrome, a non-magnetic 80/20 alloy of nickel and chromium, is the most common resistance wire for heating purposes because it has a high resistivity and resistance to oxidation at high temperatures.
Does thicker wire carry current?
There is a higher current in the thicker wire (although per unit area, of course, each wire carries the same current). … A thicker wire simply has more ‘lanes’ on the go at once. A higher current for a given voltage means a lower resistance. The thicker wire in (4) has a lower resistance than the thinner wire in (3).
What causes low resistance in a circuit?
The lower the resistance, the higher the current flow. Possible causes: insulators damaged by moisture or overheating.
Why is the resistance not constant in a light bulb?
The light bulb is non-ohmic because the curve on the voltage/current graph is non-linear. It seems as though less current is able to pass through as we increased the voltage. This indicates that the resistance is not constant and increases as more voltage is added and the light bulb heats up.
What is the resistance of a 12v 21w bulb?
about 7 ohmsThe resistance of an illuminated 12 volt 21 watt indicator bulb will be about 7 ohms. However this is not a “prefered value” so go for a 6 ohm resistor.