- Kendriya Vidyalaya Durg
... From these two equation we see that electric forces exerted by two charges on each other are equal in magnitude but are opposite in direction In above equation, we find a positive constant K and experimentally found value of K is K = 8.98755 × 10 9 Nm2/C2 K ≅ 9 × 10 9 Nm2/C2 sometimes K is written a ...
... From these two equation we see that electric forces exerted by two charges on each other are equal in magnitude but are opposite in direction In above equation, we find a positive constant K and experimentally found value of K is K = 8.98755 × 10 9 Nm2/C2 K ≅ 9 × 10 9 Nm2/C2 sometimes K is written a ...
Electric Field: Sphere of Uniform Charge
... From these two equation we see that electric forces exerted by two charges on each other are equal in magnitude but are opposite in direction ...
... From these two equation we see that electric forces exerted by two charges on each other are equal in magnitude but are opposite in direction ...
Multiferroicity: the coupling between magnetic and
... of condensed matter physics and materials science since their discovery, quite a number of challenges have emerged in dealing with multiferroicity within the framework of fundamental physics and technological applications. There are, in principle, two basic issues to address in order to make multife ...
... of condensed matter physics and materials science since their discovery, quite a number of challenges have emerged in dealing with multiferroicity within the framework of fundamental physics and technological applications. There are, in principle, two basic issues to address in order to make multife ...
ELECTRIC CHARGE, FORCE, AND FIELD ( )
... INTERPRET In this problem we are asked to find the line charge density, given the field strength at a distance from a long wire. We can assume that the wire is much, much longer than the distance involved (45 cm), so that the result of Example 20.7 applies. DEVELOP If the electric field points radia ...
... INTERPRET In this problem we are asked to find the line charge density, given the field strength at a distance from a long wire. We can assume that the wire is much, much longer than the distance involved (45 cm), so that the result of Example 20.7 applies. DEVELOP If the electric field points radia ...
Electromagnet
An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire that create the magnetic field. The wire turns are often wound around a magnetic core made from a ferromagnetic or ferrimagnetic material such as iron; the magnetic core concentrates the magnetic flux and makes a more powerful magnet.The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.Electromagnets are widely used as components of other electrical devices, such as motors, generators, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment. Electromagnets are also employed in industry for picking up and moving heavy iron objects such as scrap iron and steel.