## Which of the following factors does not affect the resistance of a conductor?

The temperature of the conductor. The cross-sectional area of the conductor. Length of the conductor. Nature of the material of the conductor.

## On what factors resistance and resistivity depends?

Resistance of a conductor depends on length of the conductor and area of cross section of the conductor, resistivity and temperature. Resistivity is a materialistic property depends on the material and temperature of the conductor.

## Which of the following does not affect a material’s resistance?

Length and area affect resistance as well as type of material expressed with . Temperature does not affect resistance.

## What does not affect 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).

## Do conductors have resistance?

Objects made of electrical insulators like rubber tend to have very high resistance and low conductivity, while objects made of electrical conductors like metals tend to have very low resistance and high conductivity. This relationship is quantified by resistivity or conductivity.

## What does not increase resistance in a wire?

Resistance is inversely proportional to cross-sectional-area. The bigger the cross sectional area of the wire the greater the number of electrons that experience the ‘electric slope’ from the potenetial difference. This means resistance decreases.

## What happens to the resistance of a conductor if its length is increased three times and diameter is halved?

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 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.

## How is the resistance of a wire affected if its length is tripled?

(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.

## Does resistance increase with diameter?

As we know that resistance of a wire is inversely proportional to the square of its diameter. Thus when the diameter of a wire is doubled (made 2 times), its resistance becomes one-fourth (1/4), and if the diameter of a wire is halved (made 1/2), then its resistance becomes four times (4 times).

## How does the resistance of a metallic wire depends on its temperature explain with reason?

With the increase in temperature of conductor, both the random motion of electrons and the amplitude of vibration of fixed positive ions increase. As a result, the number of collisions increases. Hence, the resistance of a conductor increases with the increase in its temperature.

## How does resistance and specific resistance of a wire depends on its length and radius?

Resistance is directly proportional to the length and inversely proportional to the square of radius. Specific resistance is independent on the dimensions of a wire.

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