Question

You can decrease the resistance of a length of wire by _______

Answer 1

Answer: You can decrease the resistance of a length of wire by decreasing the length of the wire.

Step-by-step explanation:

The resistance of a length of the wire is directly proportional to the length of the conductor.

By decreasing the length of the wire, the resistance of the wire can be decreased. In the short length wire, the electrons has to travel less distance. The current flows easily without any obstacle. As the resistance opposes the flow of current.

Answer 2

• Decreasing length of wire
• Increasing area of cross section.

Explanation :

According to Ohm's law :

V = I R

where,

I is the current flowing

R is the resistance

Suppose a wire of length l and area of cross section A. On the application of current in the wire a potential difference is created.

The relation between resistivity and resistance is given by :

`R=\rho\ (l)/(A)`

Where

`\rho` is the resistivity

So, the resistance of a wire depends directly on the resistivity and the length of wire but inversely on area of cross section.

The resistance of wire can be decreased by decreasing the length of wire and increasing the cross sectional area.