Does the cross-sectional area of a wire affect the resistance?

More collisions mean more resistance. Second, the cross-sectional area of the wires will affect the amount of resistance. Wider wires have a greater cross-sectional area. In the same manner, the wider the wire, the less resistance that there will be to the flow of electric charge.

How does the wire vary with its area of cross section?

larger will be the area lower will be theresistance and vice versa. this is because through a conductor with large area of cross section current can easily flow and hence resistance is low. Cross sectional area is inversely proportional to resistance.

Which has the greater resistance between two wires of the same length and material?

The relationship between resistance and wire length is proportional . 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 .

Which is lower if the cross-sectional area of wire is bigger?

The larger the cross-section of a wire, the less its resistance. Also, the larger the cross-section, the greater the amount of current (amperage) the wire can safely carry before overheating. A wire with a smaller gauge (larger diameter) can carry more power than one with a larger gauge.

How does material of wire affect resistance?

The thicker the wire, the lower the resistance. (3) Material: the material the wire is made out of will affect the resistance. Different materials have different resistivities, which is the ability of the material to allow electrons to move. It is dependent on electronic structure and temperature.

What 4 factors 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 does the resistance of A wire vary with its i area of cross section II diameter?

By increasing the area of cross section, the resistance will decrease. By increasing the diameter, the resistance will decrease.

How does the resistance of wire vary with the?

Therefore, the resistance of a wire varies inversely with the cross sectional area. Note: Since the resistance of a wire varies inversely with the cross sectional area, it means that a thicker wire has a smaller resistance and vice versa.

How does the resistance of a wire depends on its length?

Resistance of a wire is directly proportional to the length of the wire. The resistance of a conductor depends on the number of collisions which the electrons suffer with the fixed positive ions while moving from one end to the other end of the conductor. Therefore, a longer conductor offers more resistance.

What happens to the resistance of a wire as its length increases?

Resistance = (Resistivity of material) *(length of material) / (cross sectional Area of material). From above equation we can say that, the resistance of wire is proportional to its length. Hence, resistance of wire will increase if length of wire is increased. So, resistance is directly proportional to length.

Does length of wire affect current?

Length of wire definitely have effect on current and voltage.. Resistance is directly proportional to length. As the length increases, resistance increases, as a result current decreases.

What is the formula for cross sectional area of a wire?

The cross-sectional area of the wire is the area of a circle of radius r: A=πr2=π(d2)2, where d is the diameter of the wire.

Does the resistance of a wire depend on the cross sectional area?

Resistance will depend on area and length . Resitivity is a property which depends on type of material used, so it will not change on changing the cross sectional area since material of both the wires is same. Resistance of both wires will be different as geometry varies .

Can two wires of the same material have the same resistance?

The resistance is a function of the length, cross-section and resistivity of the material. So, two wires of the same material will have the same resistivity but not necessarily the same resistance. Note that two wires of the same material but different geometries could have the same resistance is their geometries coincided correctly.

Will resistivity and resistance be the same if the cross section is same?

Yes of course the resistivity would be same because it is the property of the material regardless of the cross section area. In fact the resistance changes as it is inversely proportional to the area of cross section of the material. No the resistance will not be same!! Resistivity is in ohms-meter.

What is the relationship between the resistivity of two conductors?

The resistivity of two conductors made of the same material is the same. The ratio of their resistances thus depends on their lengths and cross-sectional areas. The ratio of the resistances of the two conductors is directly proportional to the ratio of their lengths and inversely proportional to the ratio of their cross-sectional areas.