Table of Contents

- 1 How does the resistance of wire change when its length is doubled?
- 2 What happens to the resistance of a wire when its length is increased to twice its original length?
- 3 What happens to the resistance of a wire when length of wire is halved?
- 4 What happens to the resistance when the length is halved?
- 5 When the resistance of the conductor is doubled then the rate of flow of electric current is?
- 6 What is the resistance when a wire is stretched three times?
- 7 What is the resistance of a 20 ohm wire?
- 8 What is the typical resistance of a wire gauge?

## How does the resistance of wire change when its length is doubled?

(a) Resistance of a wire is directly proportional to the length of a wire; so if the length is doubled, resistance is also doubled. Thus, if radius is doubled, area increases four times and hence the resistance becomes one-fourth.

## What happens to the resistance of a wire when its length is increased to twice its original length?

resistance is directly proportional to length, so resistance will also become twice.

**What happens to the resistance if the length is doubled?**

So, the new resistance, after doubling the length of the wire, becomes twice of the original resistance. Hence, if the length of a wire is doubled, then its resistance becomes doubled.

### What happens to the resistance of a wire when length of wire is halved?

The answer :If the length of the wire is halved, it’s resistance also gets halved. Reason: Resistance is directly proportional to length of the conductor . Hope it was helpful.

### What happens to the resistance when the length is halved?

So it’s proportional to the square of the diameter. Resistance is inversely proportional to the cross-sectional area. So if the diameter is halved the cross-sectional area is quartered and the resistance is quadrupled.

**What happens to the resistance and resistivity of a wire in the following cases a wire is cut into two equal halves B wire is stretched to double its length?**

The resistance of the wire is equal to the product of resistivity of the material and length of the wire divided by the area of cross section. The volume of both wire is same. Hence, The new resistivity of the material of the wire is .

## When the resistance of the conductor is doubled then the rate of flow of electric current is?

Inew = 6 mA (Current is directly proportional to voltage; a halving of the voltage will halve the current. But current is also inversely proportional to the resistance; a doubling of the resistance will halve the current.

## What is the resistance when a wire is stretched three times?

The resistance of wire is 20 ohm. The wire is stretched to three times of its length. Then the resistance will be :- When length l increases three times, the cross section A will decease three times of previous. So length becomes 3l and cross section becomes A/3.

**What happens when a piece of resistance 20ω is drawn out?**

A piece of wire of resistance 20Ω is drawn out so that its length increases to twice its original length. Calculate the resistance of the wire in the new situation. Was this answer helpful?

### What is the resistance of a 20 ohm wire?

The resistance of wire is 20 ohm. The wire is stretched to three times of its length. Then the resistance will be : – 12th

### What is the typical resistance of a wire gauge?

Resistance Table Typical Uses Wire Gauge # Diameter in Mils. Area Diameter Ohms Per foot 25 17.900 320.40 0.03237 Heavy .050Ribbon Cable 26 15.940 254.10 0.04081 27 14.195 201.50 0.05147 Std. .050 Ribbon Cable 28 12.641 159.79 0.06490