Question: How Does Wire Thickness And Length Affect Resistance?

What happens to resistance if radius is doubled?

(a) Resistance of a wire is directly proportional to the length of a wire; so if the length is doubled, resistance is also doubled.

(b) Resistance of a wire is inversely proportional to the area of cross-section the wire.

Thus, if radius is doubled, area increases four times and hence the resistance becomes one-fourth..

What happens to voltage when resistance increases?

This means that if the voltage is high the current is high, and if the voltage is low the current is low. Likewise, if we increase the resistance, the current goes down for a given voltage and if we decrease the resistance the current goes up.

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.

What is the relation between temperature and resistance?

As temperature rises, the number of phonons increases and with it the likelihood that the electrons and phonons will collide. Thus when temperature goes up, resistance goes up. For some materials, resistivity is a linear function of temperature. The resistivity of a conductor increases with temperature.

Will current flow more easily through a thick wire or thin wire of the same material?

The current will flow more easily through the thick wire than the thin wire. It is because the resistance of a conductor is inversely proportional to its area of cross-section. If thicker the wire, less is resistance and hence more easily the current flows.

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.

Does electricity travel faster through thick or thin wires?

The thin wire will conduct electricity, but there is more electrical resistance. The thicker wire is like the four lane highway. There’s a lot less electrical resistance, and as a result, that light bulb burns brighter because more electricity can reach it.

Can a wire be too thick?

Simple answer is no. The thicker the wire then the lower the resistance. However, the thicker the wire, the more costly it is, it is not as easy to bend, it is heavier. You also will not be able to fit it to a particular connector if too thick.

Why resistance is directly proportional to length?

Directly proportional ; as the length of the wire increases , its resistance increases. Why? Simply speaking,the longer the distance the electron has to travel ,the more collisions it will face with the atoms ; which means higher resistance.

How does the length of the wire affect the 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. … Second, the cross-sectional area of the wires will affect the amount of resistance. Wider wires have a greater cross-sectional area.

Does a thicker 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 happens to resistance if length is doubled?

The resistance of a conductor is directly proportional to its length (L) as R ∝ L. Thus doubling its length will double its resistance, while halving its length would halve its resistance. Also the resistance of a conductor is inversely proportional to its cross-sectional area (A) as R ∝ 1/A.

How does changing the length and thickness of a wire affect its resistance?

There is a resistance to the flow of an electric current through most conductors . The resistance in a wire increases as: the length of the wire increases. the thickness of the wire decreases.

Why is it dangerous to replace a thicker wire with a thinner wire?

If you use the same battery but replace a thick wire with a thinner one, the electric current will get smaller and a light bulb in the circuit should get dimmer. Using a longer wire will also increase resistance. … Compared to the light bulb itself, the wires you used just don’t make much of a difference.

What happens to resistance of wire when its length is increased to twice its original length is?

resistance is directly proportional to length, so resistance will also become twice.