Question: Which Has More Resistance A Thick Or Thin Wire?

Why resistance is directly proportional to length?

Directly proportional ; as the length of the wire increases , its resistance increases.


Simply speaking,the longer the distance the electron has to travel ,the more collisions it will face with the atoms ; which means higher resistance..

Which copper wire would have the highest resistance?

In short and thick wire, area is more and length is lesser. In long and thin wire, area is less and length is more. Considering the above proportionality, long and thin wire will have higher resistance.

Can you use 14 gauge wire with a 20 amp breaker?

NEC 240.4(D)(3) states that 14 AWG must be protected at 15A. You can not use 14 AWG anywhere on a circuit that has a 20A breaker. If you are putting 15 amp receptacles on a 20 amp circuit with 12 gauge wire, then you MUST use the screw terminals, not the back stab terminals. … Just use the side terminals.

What is the thickest wire?

Gauge Thickness chart & Information:Gauge -ThicknessDimension inches thickDimension millimeters thick30.010 also known as 10 mil as it is 10/1000 inch thick.25 mm 1/4 mm36.005 also known as 5 mil as it is 5/1000 inch thick.125 mm 1/8 mm38.004.101 mm45-50.0014 .000715 more rows

Does higher gauge wire have more resistance?

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). The resistance of a wire decreases with increasing thickness.

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.

Which wire carry more current solid or stranded?

Because of its thickness, solid wire has a decreased surface area that reduces dissipation. Because of the given thickness of stranded wire, i.e., it’s thinner, there are more air gaps and a greater surface area in the individual strands of wire. Therefore, it carries less current than similar solid wires can.

What happens to resistance when voltage increases?

Ohm’s law states that the electrical current (I) flowing in an circuit is proportional to the voltage (V) and inversely proportional to the resistance (R). Therefore, if the voltage is increased, the current will increase provided the resistance of the circuit does not change.

Is it OK to oversize wire?

Yes, you can oversize a wire. You can use #12 on a 15a circuit or #10 on a 20a circuit. … If you feel safer with # 12 on a bedroom circuit, then you might as put it on a 20a breaker. You will have more ampacity, more efficient.

What can I use instead of Nichrome wire?

Nichrome is good, steel or stainless steel should also work ok and may be preferred if you need less heat and more strength.

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. A 8 ohm resistance wire will be stretched to double its length.

What type of wire has the least resistance?

short wireA short wire has a lower resistance than a long one*. Resistance is directly proportional to the length of the path through which current flows: R ∝ L. This means the longer the wire, the more resistance.

Does 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. … In the same manner, the wider the wire, the less resistance that there will be to the flow of electric charge.

Does diameter affect resistance?

Resistance is inversly proportional to the diameter of the of cross section section of a conductor . Because when diameter will large then the area of cross section will large and electrons can move more freely hence the resistance wiil reduce .

Is solid copper wire better than stranded?

The most significant difference between stranded and solid cable is performance. Because higher gauge conductors (thinner) have more insertion loss than lower gauge (thicker) conductors, stranded cables exhibit 20 to 50% more attenuation than solid copper conductors (20% for 24 AWG and 50% for 26 AWG).

Is resistance directly proportional to voltage?

Ohm’s law states that the voltage or potential difference between two points is directly proportional to the current or electricity passing through the resistance, and directly proportional to the resistance of the circuit. The formula for Ohm’s law is V=IR.

What gauge is standard house wire?

14-gaugeWire Gauge The most common sizes you’ll find in residential work are 14-gauge and 12-gauge. Larger appliances such as electric stoves, electric water heaters, electric dryers and central air units will often use 10-, 8- or even 6-gauge wire.

How does wire thickness and length affect resistance?

The longer a wire is the more resistance it has due to the longer path the electrons have to flow along to get from one end to the other. The larger the cross sectional area, the lower the resistance since the electrons have a larger area to flow through.

Does resistance depend on thickness?

Resistance is inversely proportional to the square of the thickness. So for example, if you double the thickness (ie:the diameter) of the wire, then the resistance of the thick wire will be 1/4 of that of the thin wire.

What happens if wire gauge is too big?

The more power and equipment you have, the larger the wire needs to be. … If too small of a size is used, the wire could melt because of the large amount of current flowing through it compared to how much the cables can handle. The smaller the wire diameter, the higher the resistance there will be to the flow of energy.

Why resistance decreases with increase in area?

The longer a wire is the more resistance it has due to the longer path the electrons have to flow along to get from one end to the other. The larger the cross sectional area, the lower the resistance since the electrons have a larger area to flow through.