Slide 1
... 1) near zero resistance minimal current lose magnet stays at field for years without external power source c) electric currents in the shim coils create small magnetic fields which compensate inhomogenieties ...
... 1) near zero resistance minimal current lose magnet stays at field for years without external power source c) electric currents in the shim coils create small magnetic fields which compensate inhomogenieties ...
electrostatics - Mathematic.in
... terminals of an unknown emf. A student observed that when the jockey is moved from the end A to end B of the potentiometer wire, the deflection in the galvanometer remains in the same direction. What are the two possible faults in the circuit that could result in this observation? If the galvanomete ...
... terminals of an unknown emf. A student observed that when the jockey is moved from the end A to end B of the potentiometer wire, the deflection in the galvanometer remains in the same direction. What are the two possible faults in the circuit that could result in this observation? If the galvanomete ...
Electricity, Magnetism and Applications
... and attaching a stylus to the moving parts of the ear, he was able to use this bio-mechanical device to make a recording of the sounds that entered a recording horn. It recorded on a moving glass strip, coated with a film of carbon, so there are probably no original recordings from it. ...
... and attaching a stylus to the moving parts of the ear, he was able to use this bio-mechanical device to make a recording of the sounds that entered a recording horn. It recorded on a moving glass strip, coated with a film of carbon, so there are probably no original recordings from it. ...
1. Millikan determined the charge on individual oil droplets using an
... State and explain the direction in which the droplet would move if the top plate were made more negative relative to the lower plate. ...
... State and explain the direction in which the droplet would move if the top plate were made more negative relative to the lower plate. ...
Introduction to NMR spectroscopy Nuclei of isotopes which possess
... Nuclei of isotopes which possess an odd number of protons, an odd number of neutrons, or both, have a nuclear spin quantum number, I, such that, I = 1/2n, where n is an integer 0,1,2,3...etc. Since atoms have charge, a spinning nucleus generates a small electric current which in turn creates a finit ...
... Nuclei of isotopes which possess an odd number of protons, an odd number of neutrons, or both, have a nuclear spin quantum number, I, such that, I = 1/2n, where n is an integer 0,1,2,3...etc. Since atoms have charge, a spinning nucleus generates a small electric current which in turn creates a finit ...
Sample Paper – 2012 Class – XII Subject –Physics Note
... Q4. What features of electromagnetic waves led Maxwell to conclude that light itself is electromagnetic wave? Q5. An object is placed between two plane mirrors inclined at 300 to each other. How many images do you expect to see? Q6. Two metals X and Y have work functions 2eV and 5eV respectively. Wh ...
... Q4. What features of electromagnetic waves led Maxwell to conclude that light itself is electromagnetic wave? Q5. An object is placed between two plane mirrors inclined at 300 to each other. How many images do you expect to see? Q6. Two metals X and Y have work functions 2eV and 5eV respectively. Wh ...
Unit 4 Fields and Further Mechanics - complete
... The rotor blades of a helicopter sweep out a cross-sectional area, A. The motion of the blades helps the helicopter to hover by giving a downward velocity, , to a cylinder of air, density . The cylinder of air has the same cross-sectional area as that swept out by the rotor blades. Explaining your ...
... The rotor blades of a helicopter sweep out a cross-sectional area, A. The motion of the blades helps the helicopter to hover by giving a downward velocity, , to a cylinder of air, density . The cylinder of air has the same cross-sectional area as that swept out by the rotor blades. Explaining your ...
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.