physics

Decoupling Capacitors The use of decoupling capacitors on power supply pins, such as VDD and VSS, is required (see Figure 5-1). Consider the following criteria when using decoupling capacitors: 1. Value and type of capacitor: A value of 0.1 µF (100 nF), 10-20V is recommended. The capacitor should be a low Equivalent Series Resistance (low ESR) capacitor and have resonance frequency in the range of 20 MHz and higher. It is further recommended that ceramic capacitors be used. 2. ...

Generic Marking Principles These general marking principles must be applied by all examiners when marking candidate answers. They should be applied alongside the specific content of the mark scheme or generic level descriptors for a question. Each question paper and mark scheme will also comply with these marking principles. GENERIC MARKING PRINCIPLE 1: Marks must be awarded in line with: • the specific content of the mark scheme or the generic level descriptors for the question ...

We have too many Physics resources to list here so visit include: • additional practice papers to help students prepare for exams • guidance on how to plan both the AS and A-level courses with supporting schemes of work for co-teaching • several AQA-approved student textbooks reviewed by experienced senior examiners • guidance on maths skills requirements with additional support via Exampro • resources to support key topics (including the optional topics), with detailed lesson ...

Moment of Inertia of a Uniform Ring Density and Mass Calculations Density is defined as mass per unit volume For a uniform ring, density is constant throughout To calculate mass of a ring, use the formula: mass = density x volume For a ring with constant thickness, the volume is volume = area x thickness Circumference and Area of a Ring The circumference of a ring can be calculated using the formula: circumference = 2 x π x radius The area of the ring can be calculated by finding the di...

Gravitation In the realm of Science, there exists a Force or Law that pervades and influences all Nature, and from the power of which, nothing, not even an atom, is free. It holds together the component parts of each and every individual world, and in the world's revolving prevents both its inhabitants and its vegetation from being whirled off its surface into space. It exists in each and every central sun, and circles round each sun its associated system of planets. It rolls each sate...

The SI standard of time is based on: A. the daily rotation of the earth B. the frequency of light emitted by Kr86 C. the yearly revolution of the earth about the sun D. a precision pendulum clock E. none of these Ans: E 2. A nanosecond is: A. 109 s B. 10−9 s C. 10−10 s D. 10−10 s E. 10−12 Ans: B 3. The SI standard of length is based on: A. the distance from the north pole to the equator along a meridian passing through Paris B. wavelength of light emitted by Hg198 C. wav...

1) The current definition of the standard meter of length is based on A) the distance between the earthʹs equator and north pole. B) the distance between the earth and the sun. C) the distance traveled by light in a vacuum. D) the length of a particular object kept in France. Answer: C Var: 1 2) The current definition of the standard second of time is based on A) the frequency of radiation emitted by cesium atoms. B) the earthʹs rotation rate. C) the duration of one year. D) the osc...

Laplace transformation is a mathematical technique used to convert functions of time into functions of complex frequency domain. It's commonly used in engineering and physics to solve differential equations and analyze linear systems. By transforming differential equations into algebraic equations, it allows for easier manipulation and solution of complex systems. The Laplace transform of a function ( f(t) ) is denoted by ( F(s) ), where ( s ) is a complex variable. The transformati...

Physics notes covering modern physics and thermodynamics delve into advanced topics beyond classical mechanics. They explore phenomena like relativity, quantum mechanics, nuclear physics, and particle physics in the realm of modern physics. Additionally, they delve into thermodynamics, studying heat, temperature, entropy, and the laws governing energy transfer and transformation. These notes provide comprehensive explanations, mathematical equations, and practical applications, serving as a fund...

Physics notes covering modern physics and thermodynamics delve into advanced topics beyond classical mechanics. They explore phenomena like relativity, quantum mechanics, nuclear physics, and particle physics in the realm of modern physics. Additionally, they delve into thermodynamics, studying heat, temperature, entropy, and the laws governing energy transfer and transformation. These notes provide comprehensive explanations, mathematical equations, and practical applications, serving as a fund...