Quick Answer: How Does Area Of A Wire Affect Resistance?

Why do thick wires have lower resistance?

The resistance of a long wire is greater than the resistance of a short wire because electrons collide with more ions as they pass through.

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..

What happens to the current if the resistance is increased?

The current is directly proportional to the voltage and inversely proportional to the resistance. This means that increasing the voltage will cause the current to increase, while increasing the resistance will cause the current to decrease.

What are three things that affect the resistance of a wire?

The resistance of a given piece of wire depends of three factors: the length of the wire, the cross-sectional area of the wire, and the resistivity of the material composing the wire. To understand how this works, think of water flowing through a hose.

Why is it better to use a cable with low resistance than high?

In most applications, a lower resistance means less power is converted to heat and lost to the surrounding environment and more of the supplied power gets to its intended destination. It also means that the wire and cable will run cooler and the power source can be smaller for a given load.

Which copper wire has the smallest resistance at room temperature?

(b) The ranking by resistance goes as 3 > 1 > 2. Resistance increases as length increases and cross- sectional area decreases, so case 3, with the longest length and smallest cross-sectional area, has the largest resistance. Case 2 has the smallest resistance because it has the smallest length and the largest area.

What is the relationship between electric current and resistance?

The relationship between current, voltage and resistance is expressed by Ohm’s Law. This states that the current flowing in a circuit is directly proportional to the applied voltage and inversely proportional to the resistance of the circuit, provided the temperature remains constant.

How much is too much resistance in a wire?

Ideally, the resistance should be 2000 Ω, but due to the existence of a wire, the measured resistance is 2000.01693 Ω, it’s less than 10 parts per million higher, nearly undetectable.

How does the gauge of a wire affect its 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 are the 4 factors that affect the resistance of a wire?

There are 4 different factors which affect resistance:The type of material of which the resistor is made.The length of the resistor.The thickness of the resistor.The temperature of the conductor.

How do you reduce resistance in a wire?

Of course there exist many different ways to reduce the resistance, such as using a thicker wire (increase the cross section area), lowering the temperature, or even changing the material.

Which of the following will increase the resistance of a wire?

Increasing the resistivity of the material the wire is composed of will increase the resistance of the wire. Increasing the cross-sectional area of the wire will increase the resistance of the wire. Increasing the length of the wire will increase the resistance of the wire.

Which of the following does not affect the resistance of a wire?

where – electrical resistivity (depend on material) – cross-section area of the wire (depend on diameter) – length of wire. The only item not listed here is voltage. Voltage value is not affect resistance (if we will not take into account any temperature changes).

Which has more resistivity a thick or thin wire of same material when connected to the same source?

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.

What are the different factors that affect the resistance of a wire?

There are four factors affecting resistance which are Temperature, Length of wire, Area of the cross-section of the wire, and nature of the material. When there is current in a conductive material, the free electrons move through the material and occasionally collide with atoms.

What type of wire has the least 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. What causes resistance of a current through a wire?

Does electricity travel faster through thick or thin wires?

How fast would the cars be able to leave now? 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.