Table of Contents
- 1 When a wire is stretched to 3 times its length?
- 2 What is the resistance when the wire is doubled?
- 3 How does the resistance of a wire change when 3 A Its length is tripled?
- 4 What is the new resistance of the copper wire with no volume?
- 5 How does the thickness of the wire affect the current?
- 6 What happens when you increase the length of a nichrome wire?
When a wire is stretched to 3 times 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. 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.
What is the resistance when the wire 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.
How does the resistance of a wire change when 3 A Its length is tripled?
Resistance becomes 1/9 th. Resistance becomes 3 times.
What happens to the resistance and resistivity of a wire if the length of wire becomes double and area of cross section becomes half?
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.
How does the length of a wire affect the resistance?
The wire will have a reduced cross section such that the resistance per metre will be 3 times what it was before. Therefore if the original wire was 10 metres it will now be 30 metres and the resistance will have increased to 9 times the original. The resistance per metre has increased by 3 times and the length by 3 times.
What is the new resistance of the copper wire with no volume?
Originally Answered: If a copper wire of a given length and resistance is drawn out to 3 times its length with no change in volume, what is the new resistance of the wire? New l i.e l’ = 3l. R = ro× (L/A). R’ = 9R. Means, new resistance is 9 times of old resistance. , Been playing with electronics for 55 years.
How does the thickness of the wire affect the current?
the thickness of the wire decreases An electric current flows when electrons move through a conductor, such as a metal wire. The moving electrons can collide with the ions in the metal. This makes it more difficult for the current to flow, and causes resistance.
What happens when you increase the length of a nichrome wire?
If the length of nichrome wire is increased by an increment of 10cm starting from 10cm in length, then the graph measuring the electrical resistance of the wires will observe a positive slope with the mathematical function of y = mx that displays the increasing amount of resistance generated.