- What are the four factors that affect resistance in a circuit?
- What kind of wire has the least resistance?
- What happens to current when resistance increases?
- When the length of a wire is doubled then its resistance also gets doubled?
- What is the relationship between resistance and diameter?
- What happens to resistance if diameter is doubled?
- What type of wire has the most resistance?
- Why does the length of wire increase resistance?
- Why is resistance directly proportional to length?
- How do you reduce resistance in a circuit?
- What is resistance and what factors affect it?
- Does thicker wire have less resistance?
- What happens to resistance when the conductor diameter is increased?
- How will the resistance of wire change if its diameter is doubled its length remaining the same?
- How do I calculate resistance?
- How does length and diameter affect resistance?
- What factors affect resistance in a circuit?
- What happens when diameter is doubled?
What are the four factors that affect resistance in a circuit?
There are 4 different factors which affect resistance:The type of material of which the resistor is made.The length of the resistor.The thickness of the resistor.The temperature of the conductor..
What kind of wire has the least resistance?
short wireA short wire has a lower resistance than a long one*. Resistance is directly proportional to the length of the path through which current flows: R ∝ L. This means the longer the wire, the more resistance.
What happens to current when resistance increases?
The current is directly proportional to the voltage and inversely proportional to the resistance. This means that increasing the voltage will cause the current to increase, while increasing the resistance will cause the current to decrease.
When the length of a wire is doubled then its resistance also gets doubled?
When the wire is stretched to double the length , the area of cross section gets reduced to half. So when the wire is stretched, the resistance multiplies by four times.
What is the relationship between resistance and diameter?
Cross sectional area is the area of the end of the wire (assuming a perfectly flat right angle cut). So it’s proportional to the square of diameter. Resistance is inversely proportional to cross sectional area. So if the diameter is halved the cross-sectional area is quartered and the resistance is quadrupled.
What happens to resistance if diameter is doubled?
Resistance (R) is inversely proportional to Area(A). So if radius is doubled, new area= 4x Area of original wire. So the resistance becomes 1/4th of original value. … If the material and the length of the wire is constant and the diameter doubled then the resistivity will decrease by 4 times.
What type of wire has the most resistance?
NichromeTypes. Nichrome, a non-magnetic 80/20 alloy of nickel and chromium, is the most common resistance wire for heating purposes because it has a high resistivity and resistance to oxidation at high temperatures. When used as a heating element, resistance wire is usually wound into coils.
Why does the length of wire increase resistance?
The moving electrons can collide with the ions in the metal. This makes it more difficult for the current to flow, and causes resistance. The resistance of a long wire is greater than the resistance of a short wire because electrons collide with more ions as they pass through.
Why is resistance directly proportional to length?
Directly proportional ; as the length of the wire increases , its resistance increases. Why? Simply speaking,the longer the distance the electron has to travel ,the more collisions it will face with the atoms ; which means higher resistance.
How do you reduce resistance in a circuit?
To reduce the circuit to its equivalent resistance, start at the end opposite the source (Emf). Here are the steps: Step 1: Add R2 and R3 in SERIES to get a total of 20 Ohms. Step 2: Add the result of step 1 with R5 in PARALLEL to get 6.7 Ohms.
What is resistance and what factors affect it?
Resistance is the property of the material that restricts the flow of electrons. There are four factors affecting resistance which are Temperature, Length of wire, Area of the cross-section of wire, and nature of the material.
Does thicker wire have less resistance?
A thicker wire simply has more ‘lanes’ on the go at once. A higher current for a given voltage means a lower resistance. The thicker wire in (4) has a lower resistance than the thinner wire in (3). The resistance of a wire decreases with increasing thickness.
What happens to resistance when the conductor diameter is increased?
The longer the cylinder, the higher the resistance. Additionally, the resistance is inversely proportional to the cross sectional area A. If the diameter of the cylinder is doubled, the cross-sectional area increases by a factor of 4. Therefore, resistance decreases by a factor of 4.
How will the resistance of wire change if its diameter is doubled its length remaining the same?
How will the resistance of a wire change when: (i) its length is doubled. … (ii)When diameter is doubled,the area of the wire becomes 4 times the original area. Hence new resistance becomes 1/4th of original R;since R is inversely related to the area A.
How do I calculate resistance?
Rearrange V = IR to solve for resistance: R = V / I (resistance = voltage / current). Plug the values you found into this formula to solve for total resistance. For example, a series circuit is powered by a 12 volt battery, and the current is measured at 8 amps.
How does length and diameter affect resistance?
First, the total length of the wires will affect the amount of resistance. The longer the wire, the more resistance that there will be. … Second, the cross-sectional area of the wires will affect the amount of resistance. Wider wires have a greater cross-sectional area.
What factors affect resistance in a circuit?
There are several factors that affect the resistance of a conductor;material, eg copper, has lower resistance than steel.length – longer wires have greater resistance.thickness – smaller diameter wires have greater resistance.temperature – heating a wire increases its resistance.
What happens when diameter is doubled?
If we double the diameter, 2D, the radius will also double to 4R. This tells us that if we doubled the original diameter, the radius would also be doubled. The new radius will end up being the same as the original diameter. … So if the diameter of a circle is doubled, then so is the radius of a circle.