Types of Barriers: Definition, Formula, Value and Example Questions
Types of Barriers: Definition, Formula, Value and Example Questions - What is type resistance and how is it calculated? On this occasion Seputartahu.co.id will discuss it and of course about other things that also cover it. Let's look at the discussion together in the article below to understand it better.
Types of Barriers: Definition, Formula, Value and Example Questions
Resistance is the resistance of a material to an electric current. The magnitude of the electric current flowing in a conductor is proportional to the voltage difference.
Specific resistance is the tendency of a material to oppose the flow of electric current, symbolized by ρ (rho). The determining factor for the size of the resistance value of a conductor is the material of the conductor wire
We might think that the resistance of a thick wire is less compared to thin wire, because thicker wire has a wider area for electron flow. We of course also expect that the longer a conductor, the greater its resistance, because there will be more obstacles to the flow of electrons.
If electric current or free electrons flow in a conductor that has a large diameter (cross-section), the resistance value will be lower. This is because with a large diameter the electric current will flow more easily, but if the diameter of the conductor is small then the electric current flowing will be hampered.
Likewise, if the electric current flows over a longer distance, the resistance value will be greater, However, if the electric current flows over a shorter distance, the resistance value will also increase small.
Type Barrier Values and Formulas
From the explanation above it can be concluded that the electrical resistance of a conductor will be proportional is directly proportional to the length of the conductor and is inversely proportional to the cross-sectional area conductor.
Therefore, it can be systematically formulated using the following formula:
R = ρ x l/A
Information :
- R is electrical resistance with units of Ω
- ρ is the type resistance with units of Ωm
- l is the length of the conductor in m
- A is the cross-sectional area in m2 units
The amount of ρ (read rho) depends on the specific resistance of the type of conductor used. The resistance values of several types of conductors can be seen in the table below:
Examples of Type Obstacle Questions
Question 1
What is the resistance value of an iron wire conductor (specific resistance 9.71 x 10 -8 Ωm) which has a wire length of 20 m and a diameter of 10 mm.
Solution:
Is known :
ρ = specific resistance 9.71 x 10 -8 Ωm
l = 20 m
D = 10mm
Asked: R = …. ?
Answer :
The first step is to first find the cross-sectional area of the iron wire. The cross-sectional area can be found using the formula:
A = ¼ x π x D2
A = = ¼ x 3.14 x 102
A = ¼ x 3.14 x 100
A= 78.5 mm2 = 78.5 x 10-6 m2
So the resistance of the iron wire conductor is:
R = ρ x l/A
R = 9.71 x 10 -8 Ωm x 20 m / 78.5 x 10-6 m2
R = 2.47388 x 10-2 Ω
The wire in an incandescent lamp has a resistance of 20 Ω. If the lamp is installed at 220 volts, what is the current flowing in the circuit?
Answer :
Noted that :
R = 20 Ω
V = 220 volts
R = V/i
20 = 220/i
i = 220/20 = 11 A
Question 2
A copper wire is 1 m long and has a cross-sectional area of 5 mm2. If at a temperature of 20 oC has a specific resistance of 1.7. 10-6 Ωm and the temperature coefficient is 4. 10-3oC. What is the resistance of the wire?
Answer :
Noted that :
l = 1 m
A = 5 mm2
ρt = 1,7. 10-6 Ωm
α = 4. 10-3 oC
t = 20 oC
Rt = ρt. la
= 1,7. 10-6. 1/5
= 0,34. 10-6 = 3,4. 10-5 Ω
Question 3
A wire is 10 m long, has a cross-sectional area of 1 cm2 and resistance type 10-5 Ωm. If the wire is made of the same material, has the same mass and has twice the cross-sectional area of the original wire, how much resistance will it have?
Answer :
Noted that :
l = 10 m
A1 = 1 cm2 = 0.0001 m2 = 10-4 m2
A2 = 2. 10-4 m2
ρ = 10-5 Ωm
R = ρ. la
=10-5. 10/2. 10-4
= 10-5. 5 .104 = 0,5 Ω
Question 4
A piece of nichrome wire 3 meters long has a resistance of 20 ohms. The second nichrome wire is the same length, but its diameter is ½ times the diameter of the first wire. What is the resistance of the second wire?
Solution:
Knowni:
l1 = l2 = 3 m
d2 = ½ d1
R1 = 20 Ω
ρ1 = ρ2
Asked:R2 = … ?
Answer:
Because the diameter d2 = ½ d1 then the radius of the wire is also the same, namely r2 = ½ r1. First find the cross-sectional area (A) of the second nikron wire using the formula for the area of a circle, namely:
L = πr2 so
L1 = πr2
L2 = π(½ r1)2 => L2 = ¼ πr12 => L2 = ¼L1
So, A2 = ¼A1
The resistance of the second type of conductor can be found using the formula:
R = ρl/A
ρl = R.A
In this case the length and specific resistance of the wire are the same, therefore:
(ρl)1 = (ρl)2
R1A1 = R2A2
20 ΩA1 = R2x ¼A1
R2 = 4 x 20 Ω
R2 = 80 Ω
That's the review from Seputartahu.co.id about Types of Barriers: Definition, Formula, Value and Example Questions, Hopefully it can increase your insight and knowledge. Thank you for visiting and don't forget to read other articles.
List of contents
Recommendation:
- Environmental Speech: Definition, Objectives, Characteristics and… Environmental Speech: Definition, Objectives, Characteristics and Examples - How to structure the text of an environmental speech what is good and right?, On this occasion Seputarjiwa.co.id will discuss it and of course things Which…
- Power Formula: Definition and Example Questions Power Formula: Definition and Example Questions - What is the formula for calculating the power of electrical energy? On this occasion Seputarjiwa.co.id will discuss the Power Formula and example questions. Let's look at the discussion together...
- The Collapse of the Kediri Kingdom: History and Legacy The Collapse of the Kediri Kingdom: History and Legacy - The Kediri Kingdom or Kadiri Kingdom or Panjalu Kingdom was a kingdom that existed in East Java between 1042-1222. The kingdom is in the city...
- Functions of the Lymph Circulatory System: Constituent Components and... Function of the Lymph Circulation System: Constituent Components and Anatomy - What is the Function of the Lymph Circulation System Is it clear?, On this occasion Seputarjiwa.co.id will discuss it and of course about other things that also...
- √ Understanding Dynamic Electricity and Examples of Dynamic Electricity... Understanding Dynamic Electricity and Complete Examples of Dynamic Electricity - Discussion. This time we will start discussing articles about Dynamic Electricity and also examples. Maybe some people are already familiar with...
- Moral Intelligence: Definition According to Experts, Goals,… Moral Intelligence: Definition According to Experts, Goals, Aspects, Components and How to Develop It - What is it? what does moral intelligence mean and how to build it?, On this occasion Seputar Ilmu.co.id will discuss it...
- Electric Charge: Definition, Types, Properties,... Hello guys, do you know what electric charge is? On this occasion Seputarjiwa.co.id will discuss what Electric Charge is and other elements about it. Let's look at the discussion together on...
- Watt Formula: Definition, Units, Symbols and Relationships... Watt Formula: Definition, Units, Symbols and Relationship to Ampere and Volt - What is the watt formula and how to apply it?, On this occasion Seputar Ilmu.co.id will discuss it and of course things…
- √ Complete understanding of transistors and their functions and types Complete understanding of transistors and their functions and types - Developments are becoming more and more advanced day by day What other times can we see from the point of view of the electronic world which is becoming more and more crowded in use.…
- Types of Energy: Definition According to Experts, Properties and... Types of Energy: Definition According to Experts, Properties and Examples of Energy Changes - What are they? What types of energy are there?, On this occasion Seputarjiwa.co.id will discuss it and naturally…
- Foreword: Definition, Structure and Examples Foreword: Definition, Structure and Examples - How to write a good Foreword ?On this occasion Seputarjiwa.co.id will discuss what a Foreword is and other things about it. Let's see...
- Text of Class 6 Farewell Speech: Main Content, Characteristics,... Text of the Class 6 Farewell Speech: Main Content, Characteristics, Purpose and Example of the Speech - What is the structure of the text of a class 6 farewell speech that is good, correct and touching?, On this occasion...
- Factors Inhibiting Social Mobility: Definition, Factors... Factors Inhibiting Social Mobility: Definition, Encouraging Factors and Explanations - What is the meaning of social mobility and Inhibiting factors? On this occasion Seputartahui.co.id will discuss it, including nutritional content and naturally…
- Interest is: Definition According to Experts, Factors &… Interest is: Definition According to Experts, Factors & Examples - On this occasion, Regarding Knowledge, we will discuss Interest. Which in this discussion explains the meaning of interests, characteristics, and...
- Karate: Definition, History, basic techniques and styles Karate: Definition, History, Basic Techniques and Styles - What is Karate? On this occasion Seputarjiwa.co.id will discuss what Karate is and other things about it. Let's look at the discussion together on...
- Friendship Short Stories: Definition, Writing Tips and Examples Friendship Short Stories: Definition, Writing Tips and Examples - What are Friendship Short Stories like? On this occasion Seputarjiwa.co.id will discuss what Friendship Short Stories are and other things about them. Let's see together...
- Acid-Base Solutions: Definition, Acid-Base Theory, Properties and... Acid-Base Solutions: Definition, Acid-Base Theory, Properties and Types - Acid and base solutions are two groups of chemical compounds that are widely found and used in life...
- √ 11 Definitions of Bankruptcy, Causal Factors and... 11 Definitions of Bankruptcy, Causal Factors and Indicators - In this discussion we will explain bankruptcy. Discussion that includes the meaning of bankruptcy put forward by several experts, factors causing bankruptcy and...
- Viscosity Formula: Definition of Viscosity, Coefficient and... Viscosity Formula: Understanding Viscosity, Coefficients and Influencing Factors - How is the Viscosity Formula The ?Viscosity is a measurement of the resistance of a fluid that is changed either by tension or pressure. On this occasion Seputarjiwa.co.id…
- Naturalism Is: Characteristics, Characters and Examples of Works of Art... Naturalism Is: Characteristics, Characters and Examples of Fine Art Works - What is meant by the Naturalism art school? On this occasion Seputarjiwa.co.id will discuss it, including characteristics, figures and of course...
- Examples of Scientific Work: Functions and Rules of Language Examples of Scientific Work: Functions and Rules of Language - What is an example of a good and correct form of writing a scientific work? Previously Seputartahu.co.id discussed Scientific Work: Definition, Characteristics, Benefits,...
- Paper: Definition, Characteristics, Function, Types, Structure, How… Paper: Definition, Characteristics, Function, Types, Structure, How to Make it and Examples - What is meant by Papers and how to write them well and correctly? On this occasion Seputar Ilmu.co.id will…
- Crafts from Hard Materials: Definition, Types, Techniques,… Crafts from Hard Materials: Definition, Types, Techniques, Stages of How to Make and Examples - What are they? crafts from hard materials?, On this occasion Seputarjiwa.co.id will discuss it and of course things…
- √ 17 Definitions of Job Satisfaction According to Experts, Theories,... 17 Definitions of Job Satisfaction According to Experts, Theories, Aspects and Factors - In this discussion we will explain the meaning of Job Satisfaction. Which includes the meaning of job satisfaction according to several experts...
- Cubism: Definition, History, Characteristics, Types, Figures and... Cubism: Definition, History, Characteristics, Types, Characters and Examples of Their Work - What is meant by the Cubist school of art? On this occasion Seputarjiwa.co.id will discuss it and of course other things...
- Computer Hardware: How it Works, Types, Examples and… Computer Hardware: How it Works, Types, Examples and Functions - In the current era of computerization, we are certainly familiar with computers and their devices. However, maybe there are those who don't know...
- Pencak Silat: Definition, History, Characteristics, Goals, Techniques,… Pencak Silat: Definition, History, Characteristics, Goals, Techniques and Levels - Does anyone not know what it is? Pencak Silat ?On this occasion Seputarjiwa.co.id will discuss Pencak Silat and other things other…
- √ Understanding current strength, potential difference, resistance, relationship,... Understanding Current Strength, Potential Difference, Resistance, Relationship, Example Questions - In this discussion we will explains current strength, potential difference, electrical resistance and the relationship between the three and is accompanied by example…
- Islamic Words of Wisdom Islamic Words of Wisdom - On this occasion Seputarjiwa.co.id will discuss Islamic Words of Wisdom and examples. Let's look at the discussion together in the article below to learn more...
- Cartesian Coordinates: Definition, System, Diagrams and Examples... Cartesian coordinates: Definition, System, Diagram and Example Questions - What is meant by Cartesian coordinates ?On this occasion Seputarjiwa.co.id will discuss Cartesian Coordinates and other things surround it...