Easy Electromagnet Handout (Teacher)
... can ride at 430 kph on a train with no wheels. Electromagnets lift and propel the train forward, giving riders a smooth ride as the train floats above the magnetic guideway. Scrapmetal Sorting: Electromagnets make it easy to handle scrap metal. When the current is switched on, it creates strong magn ...
... can ride at 430 kph on a train with no wheels. Electromagnets lift and propel the train forward, giving riders a smooth ride as the train floats above the magnetic guideway. Scrapmetal Sorting: Electromagnets make it easy to handle scrap metal. When the current is switched on, it creates strong magn ...
The electric field
... 1. Finding the total charge in a region when you know the electric field outside that region 2. Finding the total flux out of a region when the charge is known a) It can also be used to find the flux out of one side in symmetrical problems b) In such cases, you must first argue from symmetry that th ...
... 1. Finding the total charge in a region when you know the electric field outside that region 2. Finding the total flux out of a region when the charge is known a) It can also be used to find the flux out of one side in symmetrical problems b) In such cases, you must first argue from symmetry that th ...
Lecture 7 - Capacitance
... Dielectrics in Capacitors • We see that a dielectric reduces the electric field by a factor (E=E0/) • Hence for a given charge Q on the metal plate the potential difference V = Ed is also reduced by (V=V0/). • Thus C= Q/V is increased by [C=C0 where C0=Q/V0 is the capacitance without the d ...
... Dielectrics in Capacitors • We see that a dielectric reduces the electric field by a factor (E=E0/) • Hence for a given charge Q on the metal plate the potential difference V = Ed is also reduced by (V=V0/). • Thus C= Q/V is increased by [C=C0 where C0=Q/V0 is the capacitance without the d ...
Electrostatic charges in vx B 1 fields: the Faraday disk
... electrostatic charges whose field is just as important as v x B. Indeed, there are many cases where the two fields cancel each other exactly at every point. The Faraday disk and a conducting sphere rotating in a magnetic field will serve as examples, but this little known effect plays a fundamental ...
... electrostatic charges whose field is just as important as v x B. Indeed, there are many cases where the two fields cancel each other exactly at every point. The Faraday disk and a conducting sphere rotating in a magnetic field will serve as examples, but this little known effect plays a fundamental ...
two physical concepts, ohm and gauss
... amount of resistance that keeps the current below the blowing-up level. In the early 1800s, George Ohm published an equation called Ohm’s Law that allows you to make this calculation. Ohm’s Law states that the voltage equals current multiplied by resistance, or in standard mathematical notation: V=I ...
... amount of resistance that keeps the current below the blowing-up level. In the early 1800s, George Ohm published an equation called Ohm’s Law that allows you to make this calculation. Ohm’s Law states that the voltage equals current multiplied by resistance, or in standard mathematical notation: V=I ...
Electromagnetism_Notes
... the magnet moves affect the strength of the electromagnet. The tighter the coil and the faster the magnet moves both make the electric current stronger. ...
... the magnet moves affect the strength of the electromagnet. The tighter the coil and the faster the magnet moves both make the electric current stronger. ...
LEP 4.1.06 Current balance / Force acting on a current
... experiment, a fixed voltage of 12 V a. c. is selected and the associated current IM in the coils is measured. The conductor loops are connected via two light flexible metal stripes, first of all to a distributor, and then via an ammeter to the direct voltage output of the supply unit. The distance b ...
... experiment, a fixed voltage of 12 V a. c. is selected and the associated current IM in the coils is measured. The conductor loops are connected via two light flexible metal stripes, first of all to a distributor, and then via an ammeter to the direct voltage output of the supply unit. The distance b ...
Spherical charge distribution 2013
... When we’re in Cartesian coordinates, a volume element is straightforward (probably since this is the coordinate system that we’ve used for most of our lives). However, for curved objects, sometimes Cartesian system is ill-adept for calculations. Below is a diagram that tries to present how to determ ...
... When we’re in Cartesian coordinates, a volume element is straightforward (probably since this is the coordinate system that we’ve used for most of our lives). However, for curved objects, sometimes Cartesian system is ill-adept for calculations. Below is a diagram that tries to present how to determ ...
Electric current
An electric current is a flow of electric charge. In electric circuits this charge is often carried by moving electrons in a wire. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in a plasma.The SI unit for measuring an electric current is the ampere, which is the flow of electric charge across a surface at the rate of one coulomb per second. Electric current is measured using a device called an ammeter.Electric currents cause Joule heating, which creates light in incandescent light bulbs. They also create magnetic fields, which are used in motors, inductors and generators.The particles that carry the charge in an electric current are called charge carriers. In metals, one or more electrons from each atom are loosely bound to the atom, and can move freely about within the metal. These conduction electrons are the charge carriers in metal conductors.