28.2 Direct Sensing - The Ideal Op-Amp - CIE A Level Physics

I explain in this video the conditions that must exist for a theoretically ideal Op Amp.



I run explanations of Physics concepts closely linked with the CIE A Level Syllabus. For more videos explaining other parts of the syllabus please visit my channel.

28. Nuclear Physics
Content
28.2 The Ideal Op-Amp
Learning outcomes
Candidates should be able to:
(h) recall the main properties of the ideal operational amplifier (op-amp)

28.1 Direct Sensing - Sensing Devices - CIE A Level Physics

Explained here are the concepts of using electronic components to sense changes in the physical world.



I run explanations of Physics concepts closely linked with the CIE A Level Syllabus. For more videos explaining other parts of the syllabus please visit my channel.

28. Nuclear Physics
Content
28.1 Sensing Devices
Learning outcomes
Candidates should be able to:
(a) show an understanding that an electronic sensor consists of a sensing
device and a circuit that provides an output voltage
(b) show an understanding of the change in resistance with light intensity of
a light-dependent resistor (LDR)
(c) sketch the temperature characteristic of a negative temperature coefficient
thermistor
(d) show an understanding of the action of a piezo-electric transducer and its
application in a simple microphone
(e) describe the structure of a metal-wire strain gauge
(f) relate extension of a strain gauge to change in resistance of the gauge
(g) show an understanding that the output from sensing devices can be
registered as a voltage

27.5 Nuclar Physics - Radioactive Decay - CIE A Level Physics

Basically a summary of the mathematics behind radioactivity. I derive the expression that links half-life and decay constant, as well as explain how to determine the number of radioactive particles changes over time in a source.



I run explanations of Physics concepts closely linked with the CIE A Level Syllabus. For more videos explaining other parts of the syllabus please visit my channel.

27. Nuclear Physics
Content
27.5 Radioactive Decay
Learning outcomes
Candidates should be able to:
(n) define the terms activity and decay constant and recall and solve
problems using A = lambdaN
(o) infer and sketch the exponential nature of radioactive decay and solve
problems using the relationship x = x0exp(–ët), where x could represent
activity, number of undecayed particles or received count rate
(p) define half-life
(q) solve problems using the relation lambda = 0. 693/t(half)

27.4 Nuclear Physics - Mass Excess and Nuclear Binding Energy - CIE A Level Physics

I go into Einstein's most famous equation, E=mc^2, and explain its significance and its application. Also go into detail about mass deficits and nuclear binding energy, as well as explaining the atomic mass unit and electron volt.



I run explanations of Physics concepts closely linked with the CIE A Level Syllabus. For more videos explaining other parts of the syllabus please visit my channel.

27. Nuclear Physics
Content
27.4 Mass Excess and Nuclear Binding Energy
Learning outcomes
Candidates should be able to:
(k) show an appreciation of the association between energy and mass
as represented by E = mc 2 and recall and solve problems using this
relationship
(l) sketch the variation of binding energy per nucleon with nucleon
number
(m) explain the relevance of binding energy per nucleon to nuclear fusion
and to nuclear fission

26.5 Quantum Physics - Line Spectra - CIE A Level Physics

I wrap up the quantum physics series with a video explaining how emission and absorption spectra are produced. I go into detail about the differences between them, their significance and also how to perform simple calculations regarding them.



Visit my blog for updates and more: http://goo.gl/tMq50

I run explanations of Physics concepts closely linked with the CIE A Level Syllabus. For more videos explaining other parts of the syllabus please visit my channel.

26. Quantum Physics
Content
26.5 Line Spectra
Learning outcomes
Candidates should be able to:
(k) distinguish between emission and absorption line spectra
(l) recall and solve problems using the relation hf = E1 – E2.

26.4 Quantum Physics - Energy Levels in Atoms - CIE A Level Physics

Another short video explaining the existence of discrete energy levels of electrons within an atom, based on the principle of particle-wave duality, as well as relating this to the particulate nature of electrons. I look at the Hydrogen electron energy levels as an example.



Visit my blog for updates and more: http://goo.gl/tMq50

I run explanations of Physics concepts closely linked with the CIE A Level Syllabus. For more videos explaining other parts of the syllabus please visit my channel.

26. Quantum Physics
Content
26.4 Energy Levels in Atoms
Learning outcomes
Candidates should be able to:
(j) show an understanding of the existence of discrete electron
energy levels in isolated atoms (e.g. atomic hydrogen) and
deduce how this leads to spectral lines

26.3 Quantum Physics - Wave-Particle Duality - CIE A Level Physics

A very short video explaining the idea behind wave-particle duality. I also introduce the de Broglie wavelength formula, as well as summarise the evidence behind the theory.



I run explanations of Physics concepts closely linked with the CIE A Level Syllabus. For more videos explaining other parts of the syllabus please visit my channel.

26. Quantum Physics
Content
26.1 Photoelectric Emission of Electrons
Learning outcomes
Candidates should be able to:
(h) describe and interpret qualitatively the evidence provided by
electron diffraction for the wave nature of particles
(i) recall and use the relation for the de Broglie wavelength lambda = h/p