Are given copper wire is stretched to reduce its diameter to half its previous value what would be the new resistance?
Table of Contents
- 1 Are given copper wire is stretched to reduce its diameter to half its previous value what would be the new resistance?
- 2 How much does the resistance change if the diameter is halved?
- 3 When the diameter of a Nichrome wire is reduced to half the resistance changes by?
- 4 Why are copper wires used as connecting wires?
- 5 Why does resistance decrease with diameter?
- 6 How does resistance change when a wire is stretched?
- 7 When the length of a copper wire is increased by 1\% while stretching it then percentage change in its resistance will be?
Are given copper wire is stretched to reduce its diameter to half its previous value what would be the new resistance?
Explanation: Thus new resistance becomes 4 times its original resistance when D of given wire is half. …..
How much does the resistance change if the diameter is halved?
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 of a wire if it is stretched to make it 0.1\% longer?
Hence resistance increase by 0.2\%.
When the diameter of a Nichrome wire is reduced to half the resistance changes by?
Assertion : When a wire is stretched so that its diameter is halved then its resistance become 16 times. Reason : Resistance of wire decrease with increase in length.
Why are copper wires used as connecting wires?
Copper is an excellent conductor of electricity, allowing electricity to flow freely through it. As a result, it’s employed to form wire connections. Copper has an extremely low electrical resistance when used as a connecting wire.
Does the resistance of a copper wire increase or decrease when both length and diameter of the wire are doubled justify your answer?
Material and Shape Dependence of Resistance
| Material | Resistivity ρ ( Ω ⋅ m ) |
|---|---|
| Semiconductors | |
| Carbon (pure) | 3.5 × 105 |
| Carbon | (3.5 − 60) × 105 |
| Germanium (pure) | 600 × 10−3 |
Why does resistance decrease with diameter?
The resistance is inversely proportion to the area of the conductor. The area is proportional to the square of the diameter. Therefore, the resistance is inversely proportional to the square of the diameter of the conductor. The resistance gets decreased as the diameter is increased.
How does resistance change when a wire is stretched?
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. If The wire is stretched 3 times the original length, the cross-section of the wire is cut to 1/3rd it’s the original cross-section.
Is a copper wire is stretched to increase its length by 0.1 then percentage of increase in its resistance will be?
2\% ∴Resistance will be increased by 0.
When the length of a copper wire is increased by 1\% while stretching it then percentage change in its resistance will be?
As length is increased so the area of the cross-section will decrease. But, volume remains the same. ∴ Resistance will be decreased by 0.2\%.