The document discusses the photoelectric effect. It begins by stating that light has both wave and particle properties, and the photoelectric effect can be explained by the particle theory of light. It then explains that the photoelectric effect is the ejection of electrons from a metal surface when light of a sufficient frequency strikes it. The minimum frequency needed is called the threshold frequency. The work function and maximum kinetic energy of the ejected electrons are also defined.
Another way of interpreting Ohm's Law is that the resistance R is the voltage across the component divided by the current through it: R = V / I. ... Kirchhoff's current law: the sum of all currents into a circuit node must equal zero.
Assignment Helpers and Project Helpers Science Article
Ohm's Law Formula discovered by German Physicist Georg Simon Ohm and Joule's Law Formula discovered by James Prescott Joule
http://assignmenthelpersprojecthelpers.yoniks.com
This is a PowerPoint presentation whose contents are obtained from Earl D. Gates Introduction to Basic Electricity and Electronics. No Copyright Rules Intended to Be Violated. Only the manner of presentation is deemed original. Details about Ohm and Kirchhoff were obtained from Wikipedia.
Presentation on Electromagnetic Induction.
Physics two presentation of CSE dept. Southeast University.
PPTX slides made by Saleh Ibne Omar.
December 2017.
Another way of interpreting Ohm's Law is that the resistance R is the voltage across the component divided by the current through it: R = V / I. ... Kirchhoff's current law: the sum of all currents into a circuit node must equal zero.
Assignment Helpers and Project Helpers Science Article
Ohm's Law Formula discovered by German Physicist Georg Simon Ohm and Joule's Law Formula discovered by James Prescott Joule
http://assignmenthelpersprojecthelpers.yoniks.com
This is a PowerPoint presentation whose contents are obtained from Earl D. Gates Introduction to Basic Electricity and Electronics. No Copyright Rules Intended to Be Violated. Only the manner of presentation is deemed original. Details about Ohm and Kirchhoff were obtained from Wikipedia.
Presentation on Electromagnetic Induction.
Physics two presentation of CSE dept. Southeast University.
PPTX slides made by Saleh Ibne Omar.
December 2017.
A few basics about magnetism and Alternating currents.
Students of APJ Abdul Kalam Technological University (KTU) may find this helpful for their second module for the subject EE100 BASICS OF ELECTRICAL ENGINEERING.
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NUMERICAL SIMULATIONS OF HEAT AND MASS TRANSFER IN CONDENSING HEAT EXCHANGERS...ssuser7dcef0
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source for obtaining much needed cooling water for a power
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requirement. One of the most practical way to recover water
from flue gas is to use a condensing heat exchanger. The power
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Additionally, harmful acids released from the stack can be
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phenomenon since heat and mass transfer of water vapor and
various acids simultaneously occur in the presence of noncondensable
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condenser depends on the knowledge and understanding of the
heat and mass transfer processes. A computer program for
numerical simulations of water (H2O) and sulfuric acid (H2SO4)
condensation in a flue gas condensing heat exchanger was
developed using MATLAB. Governing equations based on
mass and energy balances for the system were derived to
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water outlet temperature, mole fraction and condensation rates
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and mass transfer coefficients and physical properties.
Harnessing WebAssembly for Real-time Stateless Streaming PipelinesChristina Lin
Traditionally, dealing with real-time data pipelines has involved significant overhead, even for straightforward tasks like data transformation or masking. However, in this talk, we’ll venture into the dynamic realm of WebAssembly (WASM) and discover how it can revolutionize the creation of stateless streaming pipelines within a Kafka (Redpanda) broker. These pipelines are adept at managing low-latency, high-data-volume scenarios.
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For more technical information, visit our website https://intellaparts.com
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
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The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
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Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
Literature Review Basics and Understanding Reference Management.pptxDr Ramhari Poudyal
Three-day training on academic research focuses on analytical tools at United Technical College, supported by the University Grant Commission, Nepal. 24-26 May 2024
2. We know that the light has dual nature.
INTRODUCTION:
The Phenomena of interference & diffraction etc. can be
explained on the basis of wave theory of light.
Whereas the phenomena of Photoelectric Effect , compton
effect can be explained on the basis of particle theory of light.
3. The ejection of electrons from a metallic surface
when the light of suitable frequency is allowed to fall
on the surface.
4. This suitable frequency is called Threshold
Frequency and the corresponding
wavelength is called threshold wavelength.
Work function: The work function is the
energy required to remove an electron from
the highest filled level in the Fermi
distribution of a solid.
5.
6. •Incident light triggers the emission of (photo)electrons
from the cathode.
•Some of them travel toward the collector (anode) with an
initial kinetic energy.
•The applied voltage V either accelerates (if positive) or
decelerates (if negative) the incoming electrons.
•The intensity I of the current measured by the ammeter as
a function of the applied voltage V is a measurement of the
photoelectron properties, and therefore a measurement of
the properties of the photoelectric effect.
7. Think about hitting a ball into outer space.
If you don't hit it hard enough, it will just come back
down. No matter how many times you hit it.
If superman hit it, he could get it into space.
Similarly, no matter how many photons strike the metal, if
none of them has sufficient energy to eject an electron
from a metal atom, you won't get a current.
If the energy the taken up by the electron is sufficient to
allow it to be released from the metal atom, you will get a
current.
9. V
V :- potential difference
Vs :- stopping potential
ʋ :- frequency (constant)
10. Vs1 Vs2 Vs3
Ʋ1
Ʋ2
Ʋ3
The stopping potential depends on the frequency:-Higher
frequencies generates higher energy electrons.
Ʋ1 > Ʋ2 > Ʋ3
11. Photoelectric effect is directly proportional to intensity.
If the frequency of the incident light is less than the threshold
frequency then no electron ejected, no matter what the
intensity.
The maximum kinetic energy of the electrons depend on the
frequency of the incident light.
The electrons were emitted immediately - no time lag.
15. Ch23:Electromagnetic Induction
Wind turbine is an example of induction at work. Wind pushes the blades of the turbine,
spinning a shaft attached to magnets. The magnets spin around a conductive coil, inducing
an electric current in the coil, and eventually feeding the electrical grid.
16. Ch23:Electromagnetic Induction
Wind turbine is an example of induction at work. Wind pushes the blades of the turbine,
spinning a shaft attached to magnets. The magnets spin around a conductive coil, inducing
an electric current in the coil, and eventually feeding the electrical grid.
17. Induced Emf and Induced Current
(a) When there is no relative motion between the coil of wire and the bar magnet,
there is no current in the coil.
(b) A current is created in the coil when the magnet moves toward the coil.
(c) A current also exists when the magnet moves away from the coil, but the
direction of the current is opposite to that in ( b).
20. Magnetic Flux
Graphical Interpretation of Magnetic Flux
The magnetic flux is proportional to the number of magnetic flux lines passing
through the area.
21. A General Expression for Magnetic
Flux
ACosBAB )(
The SI unit of magnetic flux is the weber (Wb), named after the German Physicist W.E.
Weber (1804-1891). 1 Wb = 1 T.m2.
22. EXAMPLE on Magnetic Flux
A rectangular coil of wire is situated in a constant magnetic field whose magnitude is 0.50 T.
The coil has an area of 2.0 m2. Determine the magnetic flux for the three orientations, shown
below.
23. Faraday's Law of
Electromagnetic Induction
Michael Faraday found experimentally that the magnitude of the induced emf
is proportional to the rate at which the magnetic flux changed. Faraday’s law
can be written as,
.; AB
t
N
where N is the number of turns in the loops, A is the area of one loop, ξ is
the induced emf, and B┴ is the perpendicular component of the magnetic
field.
24. Lenz's Law
.; AB
t
N
The SI unit for the induced emf is the volt, V. The minus sign in the above Faraday’s
law of induction is due to the fact that the induced emf will always oppose the
change. It is also known as the Lenz’s law and it is stated as follows,
The current from the induced emf will produce a magnetic field, which will always
oppose the original change in the magnetic flux.
26. An Induction Stove
The water in the ferromagnetic metal pot is boiling. Yet, the water in the glass pot is not
boiling, and the stove top is cool to the touch.
The stove operates in this way by using electromagnetic induction.