Table of Contents
- 1 When wire of resistance R is bent in to a form of circle then what is the effective resistance across its diameter?
- 2 What happens to resistance when wire is bent?
- 3 How will you join three resistances each of 2ω so that the effective resistance is 3ω?
- 4 Does bend in wire affect resistance?
- 5 What will be the change in the resistance of a circular wire when its radius is halved and length is reduced to 1/4th of its original length?
- 6 What is the internal resistance of the cell?
- 7 What is the equivalent resistance of a bent resistance in parallel?
- 8 How do you calculate the equivalent resistance of a wire?
When wire of resistance R is bent in to a form of circle then what is the effective resistance across its diameter?
hence, the resistance across the diameter of circle is R/4.
What happens to resistance when wire is bent?
Free electrons in a wire have small value of drift velocity and hence low value of inertia of motion. That is why, the electrical resistance is not affected on bending the wire till the area of cross-section remains the same at the bend.
What is the resistance of a circular wire?
The specific resistance rho of a circular wire of radius r, resistance R, and length l is given by rho = pi r^(2) R//l.
Do bending of wires change current flowing through them explain?
Flow of electrons is not affected by bending a wire, hence there is no effect on electrical resistance. Resistance is defined as the obstruction to the flow of current.
How will you join three resistances each of 2ω so that the effective resistance is 3ω?
Keep two resistors in parallel and one in series. Equivalent resistance for parallel resistance will be 1/2 +1/2 = 1. And adding this to series will give 1 + 2 = 3 ohms.
Does bend in wire affect resistance?
Bending a wire does not effect electrical resistance.
Why do bends in a wire does not affect its resistance?
. where r is resistivity of material which does not depend on the geometry of wire. Since when wire is banded, resistivity, length and area of cross-section do not change, therefore resistance of wire also remain same.
What will the resistance R of a wire when its radius is halved and length is reduced to 1/4th of its original length?
Comparing (4) and (5), we see that the resistance of the wire is the same even after changing the dimensions as per the given question. Hence, when the radius is halved and length is reduced to one-fourth of its original length the resistance still remains constant.
What will be the change in the resistance of a circular wire when its radius is halved and length is reduced to 1/4th of its original length?
Implies, there is no change in resistance when radius is halved and length is reduced to one-fourth of it’s original length.
What is the internal resistance of the cell?
Internal Resistance is the resistance which is present within the battery that resists the current flow when connected to a circuit. Thus, it causes a voltage drop when current flows through it. It is the resistance provided by the electrolyte and electrodes which is present in a cell.
Why do bends in wire does not affect its resistance?
When a wire is bent, there is no change in its resistivity, length or the area of cross-section. Hence the resistance of the wire remains unchanged.
What is the resistance when a wire is bent into a circle?
Originally Answered: A wire of resistance 4 ohms is bent into a circle. What is the resistance between the ends of the diameter of the circle? Since, you bent wire in cirlce resitance between two halfs of circle will become half, both resitance are in parellel. Originally Answered: A wire of resistance 4 ohms is bent into a circle.
What is the equivalent resistance of a bent resistance in parallel?
When a resistance is bent in a circle, the resistors are are connected in parallel. Each of the resistors (the 2 parallel resistors of the circle) have a resistance of 10 ohms. R eq = R1 x R2 / R1R2 (where R eq is equivalent resistance in parallel connections)
How do you calculate the equivalent resistance of a wire?
Take a diameter on circle formed by Wire and you will get two point in form of the ends of diameter , with respect to which you have to calculate the equivalent resistance. You will have a parallel combination of two equal resitance each of magnitude R/2 . Req = [R/2 * R/2] / (R/2 + R/2) = R/4 .
How many ohms is the resistance of a circle?
The resistance of each side of the circle is half that of the resistance wire, ie 10 ohms. However, there are two sides to the circle, which are now in parallel, so the total resistance from side to side is 5 ohms.