Leyden Jar

A Leyden jar is a device used to store static electric charge. It can be used to conduct many experiments with electricity such as creating a spark across a gap. https://physicslens.com/leyden-jar/Follow

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Resonating Pendulums

The purpose of this demonstration is to teach the conditions and effects of resonance.  Our setup includes three sinkers hanging from a rod. I give credit to my colleague Alan Varella for showing me this demonstration when I first started teaching. What I do with my class is that I would jokingly announce that I

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Electroscope

An electroscope is a device that can be used to detect or measure the amount of charge in its vicinity. One of the earliest electroscopes is the gold-leaf electroscope which was invented by a British clergyman Abraham Bennet. This is a cheaper model of the leaf electroscope made using aluminum foil. Materials Paper clip Aluminum

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Oersted's Experiment

Hans Christian Oersted showed that an electric current can affect a compass needle in 1820. This confirms the direct relationship between electricity and magnetism, which in turn, paved the way for further understanding of the two. The direction of the magnetic field can be changed by flipping the wire around, which suggests that the direction

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04. Forces

Types of Forces Static friction Frictional force between surfaces at rest with respect to each other. It increases with increasing applied force up to a maximum value (which is proportional to normal contact force). Kinetic friction Frictional force acting between surfaces in relative motion. Viscous forces Resistive force experienced by a solid moving in a fluid.

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03. Dynamics

[accordions autoHeight='true'] [accordion title="1. Newton's Laws of Motion"] Newton's First Law:  a body will remain in its state of rest or uniform motion in a straight line unless acted upon by a resultant force. Newton's Second Law:  the rate of change of momentum of a body is proportional to the resultant force acting on it and the

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02. Kinematics

[accordions autoHeight='true'] [accordion title="1. Definitions"] Displacement is the distance travelled along a specified direction. Speed is the rate of change of distance travelled. Velocity is the rate of change of displacement. Acceleration is the rate of change of velocity. [/accordion] [accordion title="2. One-Dimensional Motion with Constant Acceleration"] s: displacement u: initial velocity v: final velocity a: acceleration t: time [/accordion]

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01. Measurement

[accordions autoHeight='true'] [accordion title="1. Base and Derived Quantities"] Physical quantities are classified as base (or fundamental) quantities and derived quantities. 7 base quantities are chosen to form the base units. Base Quantity Base Unit mass kilogram (kg) length metre (m) time second (s) electric current ampere (A) temperature kelvin (K) amount of substance mole (mol) luminous intensity candela

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Angular Displacement - 2011 A-level question

A disc rotates clockwise about its centre O until point P has moved to point Q, such that OP equals the length of the straight line PQ. What is the angular displacement of OQ relative to OP? A.   B.    C.    D.   https://physicslens.com/angular-displacement/Follow

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Static Electricity

This question is meant for TA 2B and 2C Physics students. Other than the demonstrations we have tried out during class, could you think of any other way in which static electricity can be observed? Please leave your comments below. You may need to log in to Facebook while doing so. https://physicslens.com/static-electricity/Follow

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