Catalyst University
Show The Factor by Which Electricity is Stronger than Gravity
Show The Factor by Which Electricity is Stronger than Gravity
Flipping Physics
Balloon Excess Charges Experiment
Two 0.0018 kg balloons each have approximately equal magnitude excess charges and hang as shown. If θ = 21° and L = 0.39 m, what is the average number of excess charges on each balloon?
NASA
Electric Wind of Venus
Venus has an "electric wind" strong enough to remove the components of water from its upper atmosphere. This action may have played a significant role in stripping Earth's twin planet of its oceans, according to new research results from...
Flipping Physics
Magnetic Fields - Review for AP Physics C: Electricity and Magnetism
AP Physics C: Electricity and Magnetism review of magnetic fields including: the basics of magnetic dipoles, ferromagnetic and paramagnetic materials, the Earth’s B field, magnetic permeability, the magnetic force on a moving charge, the...
Flipping Physics
Introduction to Coulomb's Law or the Electric Force
Coulomb’s Law is introduced and compared to Newton’s Universal Law of Gravitation. “Point Charge” is defined. Micro, Nano, and Pico prefixes are explained. Two basic example problems are solved. And a the fact that the electric force is...
Flipping Physics
Determining the Speed of the Electron in the Bohr Model of the Hydrogen Atom
Assuming a circular orbit of the electron about the nuclear proton in the Bohr model of the hydrogen atom, determine the speed of the electron.
Flipping Physics
Polarization of Charge
Three demonstrations of polarization of charge are shown. A balloon polarizes a wall, small pieces of paper, and an aluminum can. The difference between conducting and inducting materials is presented.
Professor Dave Explains
Electric Charge and Electric Fields
What's the deal with electricity? Benjamin Franklin flies a kite one day and then all of a sudden you can charge your phone? There's a gap in conceptual understanding! Let's figure out what electricity is, exactly, and how it works.
Flipping Physics
Electric Charge, Law of Charges, and Quantization of Charge
The Law of Charges is demonstrated using a rubber balloon suspended from the ceiling. The net charge on an object via excess protons and electrons. Quarks as the constituent of protons and neutrons. Quantization of charge is...
Bozeman Science
Bozeman Science: Calculating the Electric Force
In the following video Paul Andersen explains how you can use Coulomb's Law to determine the electric force between two charges. [6:50]
Khan Academy
Khan Academy: Electric Field Direction
The direction of an electrical field at a point is the same as the direction of the electrical force acting on a positive test charge at that point. This video demonstrates how to solve electrical field problems. [12:35]
Khan Academy
Khan Academy: Triboelectric Effect and Charge
Learn the physics behind why a balloon clings to things after you rub it on a sweater in this video. [11:46]