What happens to resistance if wire is stretched thrice its length?

Answer: The resistance of a wire is inversely proportional to its area and directly proportional to its length. When the length is tripled then resistance will also become three times.

What happens to resistivity of a wire if it’s length is doubled by stretching it?

(d) Resistivity of wire remains constant. As the length of wire gets doubled, the cross-sectional area will become half of its previous value because volume of wire remains constant. Hence, we can see that the new resistance is four times the previous resistance.

What happens to resistivity of a wire if it is stretched?

Resistivity of a material does not change with dimensions. It depends on material and temperature. Hence, by stretching a wire, there will be no effect on its resistivity. It will remain same.

What happens to the resistivity of a wire if it is stretched to double its initial length * 1 point?

When the wire is stretched to double the length , the area of cross section gets reduced to half. So when the wire is stretched, the resistance multiplies by four times.

How is the resistivity of a conductor affected if its length is only increased three times?

Resistivity of a conductor such as wire will increase by nine times when it is stretched by three times. It is directly proportional to the length and inversely proportional to diameter. So the resistivity will also triple.

What happens if length is doubled?

From the equation, we understand that resistance is directly proportional to the length of the conductor and inversely proportional to the crossectional area of the conductor. Doubling the length doubles the resistance.

What does the resistivity of a wire depends on?

The resistivity is the property of the material which depends on the nature and the composition of the material and the composition is affected by the temperature. And the length and area of the cross-section is affected by the resistance, not the resistivity. Hence, the resistivity depends on the temperature.

Which can change the resistivity of a conductor?

The resistivity of conductors increases with rise in temperature. This in result increases the number of collisions and the average time of collisions decreases with temperature. Since the resistivity is inversely proportional to the average time , therefore resistivity increases.

When a wire of resistance 10 Ohm is stretched double to its length then its resistivity becomes?

So assuming it were possible to stretch a wire to double it’s length without crystallizing the metal to drastically alter its resistance or resistivity the resulting wire would be half as thick.