This document provides an overview of electricity, including definitions of key terms like electric current, voltage, resistance and circuits. It explains that electricity is a form of energy that can power appliances. Current is the flow of electric charges in a circuit. Voltage and electromotive force (EMF) refer to the "push" of electricity. Resistance opposes current flow. Circuits can be connected in series or parallel. Electricity has heating, chemical and magnetic effects. Common applications like lighting, heating and electroplating are discussed.
We break down what to look for when troubleshooting electrical faults. Learn more about troubleshooting logic and how it will help you identify common electrical faults.
The Basics of electronics can be studied also through the link http://bit.ly/2PPv0mv
A transformer is a passive electrical device that transfers electrical energy from one electrical circuit to one or more circuits.
Electrical instruments are instruments that use the mechanical movement of electromagnetic meter to measure voltage, power, current… Electrical technicians require electrical measurement equipment to check the electrical activity and to detect the presence of voltage or current. By using this instrument we can measure electrical parameters such as voltage, frequency, current, power factor, and resistance. Electrical measurements are depended upon either current or voltage while measuring the frequency we will be measuring the frequency of a current signal or a voltage signal.
We break down what to look for when troubleshooting electrical faults. Learn more about troubleshooting logic and how it will help you identify common electrical faults.
The Basics of electronics can be studied also through the link http://bit.ly/2PPv0mv
A transformer is a passive electrical device that transfers electrical energy from one electrical circuit to one or more circuits.
Electrical instruments are instruments that use the mechanical movement of electromagnetic meter to measure voltage, power, current… Electrical technicians require electrical measurement equipment to check the electrical activity and to detect the presence of voltage or current. By using this instrument we can measure electrical parameters such as voltage, frequency, current, power factor, and resistance. Electrical measurements are depended upon either current or voltage while measuring the frequency we will be measuring the frequency of a current signal or a voltage signal.
An excellent guide on resistors which provides knowledge on Types, Color coding, Carbon film, Metal film, prefixes, symbols, wire wound, integrated circuit resistors, Color coding, potentiometer, negative temperature coefficient, positive temperature coefficient, series, parallel, series-parallel configurations and the practical method to measure the value of resistance. The concept of Ohm Law is also introduced. Formulas for solutions are also provided. The coding method is explained with the help of chart and all 4-band, 5-band, 6-band types are discussed.
Building Isomorphic Apps (JSConf.Asia 2014)Spike Brehm
Over the past year or so, we’ve seen the emergence of a new way of building JavaScript web apps that share code between the web browser and the server, using Node.js — a technique that has come to be known as "isomorphic JavaScript.” There are a variety of use cases for isomorphic JavaScript; some apps render HTML on both the server and the client, some apps share just a few small bits of application logic, while others share the entire application runtime between client and server to provide advanced offline and realtime features. Why go isomorphic? The main benefits are performance, maintainability, reusability, and SEO.
This talk shares examples of isomorphic JavaScript apps running in the wild, explore the exploding ecosystem of asset building tools, such as Browserify, Webpack, and Gulp, that allow developers to build their own isomorphic JavaScript apps with open-source libraries, demonstrate how to build an isomorphic JavaScript module from scratch, and explore how libraries like React and Flux can be used to build a single-page app that renders on the server.
Physics Class X Electric Current
Contents
1 Electricity
2 Electric Current
3 Electric Potential & Potential Difference
4 Electromotive Force (emf)
5 Electric Circuit and components
6 Current and Voltage Measurements
7 OHM’s Law
8 Factors Affecting Resistance
9 Combination of Resistors(Series & Parallel)
10 Heating Effect of Electricity and its apps.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
2. What we will Learn…
• What is a current?
• How to draw electric circuit diagrams
• What is potential difference, voltage and E.M.F?
• What is resistance?
• S/E: Circuits arranged in series versus parallel
• S/E: Fixed resistors versus variable resistors
• Effects of electric current
4. Where does Electricity come from?
Mainly 2 sources:
1) Power Stations
- Supply a lot of electricity
- Used in many electrical
appliances
2) Electric Cells (batteries)
- Supply a little electricity
- Portable
- Safe
5.
6. How does an Electrical
Appliance Work?
• To make an electrical appliance
work, electricity must flow through it.
• The flow of electricity is called an electric
current.
• The path along which the electric current
moves is called the electric circuit.
7. What is an Electric
Current???
Definition:
An electric current is the rate of flow of electric
charges in a circuit.
connecting
wire
electric
cell
filament
flow of electrons
8. Electric Charges
• Electric charges are made up of positive
charges (protons) and negative charges
(electrons).
• When these charges flow in a circuit, a
current is produced.
9. How does electricity flow?
• The battery in a circuit gives energy to
the electrons and pushes them around
a circuit, from the negative terminal of
the cell, round the circuit and back to
the positive terminal of the cell.
10. • The SI unit for electric current is ampere (A).
• Smaller currents are measured in
milliamperes (mA).
• Different electrical components and
appliances require different sizes of current
to turn them on.
How to Measure Current?
1 A = 1,000 mA
1 mA = 0.001 A
11. Instrument to Measure Current
• An ammeter is an instrument used for
measuring electric current.
12. Ammeter
• It must be connected in series in the circuit.
• Positive side of ammeter must be connected
nearest to the positive terminal of the battery
(electric cell), and vice versa.
13.
14. Electric Circuits
• Electric circuits are
made up of electrical
components
• These components
must be joined
together without any
gap in between to
form a closed circuit.
connecting wires
electric cell
circuit boardlight bulb
Note:
Components refer to the
light bulb, wires, battery
15. Electric Circuits
• Incomplete circuits are called open circuits.
connecting wire is
missing
no source of
electrical energy
Both the circuits in the diagram are incomplete, hence they are known
as “open circuits”.
16. An electric current flows
only when there is:
• a source of electrical energy and
• a closed circuit
connecting wires
electric cell
circuit boardlight bulb
17. How to draw Circuit Diagrams
Component Symbol Component Symbol
An electric cell Battery
Light bulb (lamp) Switch
Switch (open)
Switch (closed)
Connecting wires
(not joined)
Connecting wires
(joined)
+ +
Symbols are used to represent the various electrical
components in circuits.
21. Switches
A switch is used to open or close a circuit.
Main switch used
in buildings
Switches used on circuit
22. Circuit diagrams for open
and closed circuits
Open circuit.
Bulb does not
light up when
the switch is
Close circuit.
Bulb will light
up when the
switch is
23. Series and Parallel
There are 2 ways in which an
electric circuit can be
arranged:
1. Series
2. Parallel
24. Series Circuit
• A series circuit connects the components one
after the other
• A single loop is formed
• A break in any part of a series circuit stops the
flow of current in the whole circuit.
25. Parallel Circuit
• A parallel circuit divides into two or more branches.
• The current divides and flows through each parallel
branch.
• If a component breaks or is removed, the other
components remain on.
26. Which of the following is a
series circuit?
Which is a parallel circuit?
Series Circuit Parallel Cir
27. Draw the circuit diagram for
the following set up and state
whether it is a series or
parallel circuit.
28. Draw the circuit diagram for
the following set up and state
whether it is a series or
parallel circuit.
30. Which of the following is a
series circuit?
Which is a parallel circuit?
Series Circuit Parallel Circ
31.
32. Voltage
• An electric cell gives energy to the electrons and
pushes them round a circuit. Voltage is a measure
of how much energy the electrons receive.
• Different voltages are supplied by different cells and
batteries.
12 V Car Battery
1.5 V Dry Cell
9 V Dry Cell
33. How to Measure
Voltage?
• The SI unit for voltage is volt
(V).
• A voltmeter is an instrument
used for measuring voltages.
34. Voltmeter
• Voltmeters must be connected
in parallel to the circuit.
• The positive side of voltmeter
is connected to the positive
terminal of the cell, and vice
versa.
35. Recall: Ammeter!!!
• It must be connected in series in the
circuit.
• Positive side of ammeter must be
connected nearest to the positive
terminal of the battery (electric
cell), and vice versa.
36. Electromotive Force
(e.m.f)
• Electromotive force is the
same as voltage.
• E.m.f refers to the amount of
energy supplied by the electric
source (eg. battery) to each unit
of electric charge.
39. Potential Difference
(p.d)• Remember Diffusion?
• High Low
• Similarly, electric charges
will flow from a point of
higher potential (energy) to
lower potential
connecting
wire
electric
cell
filament
flow of electrons
•This difference in electric potential between 2 points in a
circuit is known as the potential difference. It is the same
as VOLTAGE also.
40.
41. Resistance
• When an electric current flows
through a circuit, there will be
some resistance that opposes it.
(similar to friction)
• It can be measured by dividing
voltage by the current.
R =
V
I
R = Resistance
V = Voltage
I = Current
42. Resistance
• Good conductors of electricity
have LOW RESISTANCE. (Eg. Metal
objects)
– Electricity is able to flow
through them very easily
• Poor conductors of electricity
have HIGH RESISTANCE. (Eg.
Wood, cloth)
– Electricity is not able to
43. • The SI unit for resistance is ohm ()
• Different electrical components
have different resistance
• For example, nichrome wires have a
higher resistance than copper wires.
Resistance
So should we use
nichrome or copper
to make wires?
44. Example 1
• An electric rice cooker
operates at 240 V and uses a
current of 8 A. What is the
resistance of the rice cooker?Voltage (V)
= 240 V
Current (I)
= 8 A
R =
V
I
R =
240
8
= 30
45. Resistors
• An electrical component that is specially made to have a
certain resistance is called a resistor.
• They can be connected in a circuit to resist the current
flow.
46. Fixed Resistors and
Variable Resistors
• Fixed resistors have only one resistance value
• Variable resistors can be adjusted to change
the resistance.
fixed resistor symbol variable resistor symbol
•Variable
resistors are
useful in light
dimmers and
47. S/E: Resistors
• Resistors can be connected in
series or parallel
single resistor
extra resistor in
series results in
dimmer bulb
extra resistor in
parallel results
in brighter bulb
Resistors connected
in SERIES
Resistors connected
in PARALLEL
48. S/E: Resistors in
Series
• When resistors
are connected in
series, the
resistance will
add up and
increase.
• R = R1 + R2 + R3…
2 3
The total resistance for this circuit is:
2 + 3 = 5
49. • When resistors are
connected in parallel, the
resistance will decrease
• This is because they will
provide alternate routes for
the current to flow.
S/E: Resistors in
Parallel
50. S/E: Resistors in
Parallel
6
6
1
R
=
1
R
1
R
1
R
+ +
1 2 3
What is the
resistance of the
circuit?1
R
=
1
6
1
6
+
1
R
=
2
6
1
3
= R = 3 The final
resistance is
51. What we will Learn…
• What is a current?
• How to draw electric circuit
diagrams
• What is potential difference, voltage
and E.M.F?
• What is resistance?
• S/E: Circuits arranged in series versus
parallel
52.
53. Heating Effect of
Electric Current• When an electric current flows through
a wire, the wire heats up. Electrical
energy has been converted into heat
energy.
• The greater the resistance of the wire,
the greater the amount of heat
produced. This heating effect is used in
common electrical appliances.
Iron Kettle Hair Dryer
54. A kettle uses both copper and nichrome wires.
Copper has low resistance while nichrome has high resistance.
Which material, copper or nichrome, should be used for the heating
element, and for the external wire?
Use copper wire
for the external
wire as it has low
resistance &
produces less heat
Use nichrome wire for the heating
element as it has high resistance&
produces a lot of heat
55. filament wire produces
heat and light
In a light bulb, the
heated filament which is
also a resistance
wire, becomes so hot
that light is also
emitted.
Heating Effect of
Electric Current
ARGON (inert/unreactive gas)
56. Chemical Effect of
Electric Current
What is ELECTROLYSIS?
Definition:
• Electrolysis is the chemical change that occurs when an electric
current passes through solutions or molten compounds.
58. 1. Electroplating
• In electroplating, a key is
covered with a thin layer of
copper when electricity is
passed through the solution.
key copper
wire
copper
sulphate
solution
start after a few minutes
copper on
the key
- +
60. 2. Extraction of metals
• Some metals (eg. sodium, aluminium) are obtained
by electrolysis.
• To extract the metal
– heat the solid compound of the metal until it melts
– pass an electric current through the molten
compound
61. Magnetic Effect of a
Current• A straight wire is placed near a
compass. When an electric current
flows through the wire, the
compass needle is deflected. This
shows that an electric current has
a magnetic effect.
compass needle is
deflected
current
in wire
62. Electromagnet
• An electromagnet is a magnet that
is made by using electricity
• It consist of a wire coiled around a
metal rod (eg. Iron)coil of wire
to battery
iron core
compass needle is strongly
attracted to iron core
63. Electromagnet
The magnetic effect of the electromagnet can be
increased by:
1. increasing the current (by using more batteries)
2. increasing the number of turns of wire in the coil
3. Using an iron rod
64. Differences between an
electromagnet and a magnet:
Electromagnet Magnet
A temporary magnet
which can be turned
on and off using
electric current.
A permanent magnet
which retains
magnetism until it is
purposely
demagnetised
(spoilt).
Magnet can be made
stronger or weaker
Magnet remains the
same strength
65. Uses of
Electromagnets
• Cranes that lift
iron/steel
• Iron/steel
separators
• Electric bells
• Magnetically
levitated trains
• Electric motors
crane
Electric motor in fans
Electric bell