- What is the formula of equivalent resistance?
- What is the relationship between resistance and diameter?
- Why does the diameter of the wire affect the resistance?
- How do I calculate resistance?
- What affects the resistance of a wire?
- How does thickness affect resistance?
- What happens to the current if the resistance is increased?
- Why is resistance directly proportional to length?
- How will the resistance of wire change if its diameter is doubled its length remaining the same?
- How the length of a wire affects the resistance experiment?
- How does the resistance of a wire change when its length is tripled its diameter is doubled?
- Which wire has more resistance thick or thin?
- Do LEDS have resistance?
- What are the 4 factors that affect resistance?
- What is the effect of length on resistance?
- What will happen to the resistance if the diameter is doubled?
- What type of wire has the least resistance?
- What are the 3 factors that affect resistance?
What is the formula of equivalent resistance?
The sum of the current in each individual branch is equal to the current outside the branches.
The equivalent or overall resistance of the collection of resistors is given by the equation 1/Req = 1/R1 + 1/R2 + 1/R3 ….
What is the relationship between resistance and diameter?
Because the thickness of a wire is usually represented by its diameter. Thus when the diameter of a wire is doubled (made 2 times), its resistance becomes one-fourth (1/4), and if the diameter of a wire is halved (made 1/2), then its resistance becomes four times (4 times).
Why does the diameter of the wire affect the resistance?
The longer a wire is the more resistance it has due to the longer path the electrons have to flow along to get from one end to the other. The larger the cross sectional area, the lower the resistance since the electrons have a larger area to flow through. This will continue to apply no matter how thick the wire is.
How do I calculate resistance?
If you know the total current and the voltage across the whole circuit, you can find the total resistance using Ohm’s Law: R = V / I. For example, a parallel circuit has a voltage of 9 volts and total current of 3 amps. The total resistance RT = 9 volts / 3 amps = 3 Ω.
What affects the resistance of a wire?
The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area. Resistance also depends on the material of the conductor. See resistivity. The resistance of a conductor, or circuit element, generally increases with increasing temperature.
How does thickness affect 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 the current if the resistance is increased?
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.
Why is resistance directly proportional to length?
As the length increases, the number of collisions by the moving free electrons with the fixed positive ions increases as more number of fixed positive ions are present in an increased length of the conductor. As a result, resistance increases.
How will the resistance of wire change if its diameter is doubled its length remaining the same?
(i)When length is doubled,thr original resistance R becomes 2R,i.e.,the resistance also doubles. (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 the length of a wire affects the resistance experiment?
From the graph it can be seen that the longer the piece of wire, the higher the resistance. Resistance is directly proportional to length as the graph gives a straight line through the origin.
How does the resistance of a wire change when its length is tripled its diameter is doubled?
1 Answer. Resistance becomes 1/9 th. Resistance becomes 3 times.
Which wire has more resistance thick or thin?
The resistance of a thin wire is greater than the resistance of a thick wire because a thin wire has fewer electrons to carry the current. The relationship between resistance and the area of the cross section of a wire is inversely proportional .
Do LEDS have resistance?
An LED (Light Emitting Diode) emits light when an electric current passes through it. The simplest circuit to power an LED is a voltage source with a resistor and an LED in series. Such a resistor is often called a ballast resistor. … If the voltage source is equal to the voltage drop of the LED, no resistor is required.
What are the 4 factors that affect resistance?
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 is the effect of length on resistance?
Like the resistance to water flow, the total amount of resistance to charge flow within a wire of an electric circuit is affected by some clearly identifiable variables. First, the total length of the wires will affect the amount of resistance. The longer the wire, the more resistance that there will be.
What will happen to the resistance if the diameter is doubled?
Resistance (R) is inversely proportional to Area(A). So if radius is doubled, new area= 4x Area of original wire. … As you can see in the picture if you increase the diameter of the wire then the resistance will decrease .
What type of wire has the least resistance?
SilverSilver has the lowest resistivity. That means for a given length and diameter of wire it will also have the lowest resistance.
What are the 3 factors that affect resistance?
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.