PHYS219 Fall semester 2014 - Purdue Physics
... A loop of wire with a 15 cm radius is placed in a uniform magnetic field of 2 T at an angle of 45o. If the wire is carrying a current of 10 A, what torque will the coil feel? ...
... A loop of wire with a 15 cm radius is placed in a uniform magnetic field of 2 T at an angle of 45o. If the wire is carrying a current of 10 A, what torque will the coil feel? ...
Ørsted - The first Danish Satellite
... Magnetic fields due to ocean tides (contd) Magnetic effect of oceanic M2 tide as seen by CHAMP ...
... Magnetic fields due to ocean tides (contd) Magnetic effect of oceanic M2 tide as seen by CHAMP ...
The electric field
... The solution: The simple solution is to use superposition. The electric field in the middle of a complete ring is, of course, zero. Now we’ll sum up the field of a complete ring with the field of a very small wire of the same size and shape as the hole but with a negative charge. ~ = kλb x̂ Because ...
... The solution: The simple solution is to use superposition. The electric field in the middle of a complete ring is, of course, zero. Now we’ll sum up the field of a complete ring with the field of a very small wire of the same size and shape as the hole but with a negative charge. ~ = kλb x̂ Because ...
A three-dimensional magnetic field and electromagnetic force
... The magnetic force between two wires carrying currents I and I ′ can be calculated by using the BiotSavart-Laplace law: Fig. 1. (a) Magnetic system consisting of a wire carrying a current I . (b) Magnetic system consisting of two interacting wires that carry currents I and I ′ . ...
... The magnetic force between two wires carrying currents I and I ′ can be calculated by using the BiotSavart-Laplace law: Fig. 1. (a) Magnetic system consisting of a wire carrying a current I . (b) Magnetic system consisting of two interacting wires that carry currents I and I ′ . ...
Episode 411: Describing magnetic fields
... Having covered magnetic fields for permanent magnets, you can move on quickly to revise the basic magnetic field patterns due to the electric current in a long straight wire, small flat coil and solenoid. Again, this revision is a reminder of pre-16 ideas and demonstrations. Students can look at som ...
... Having covered magnetic fields for permanent magnets, you can move on quickly to revise the basic magnetic field patterns due to the electric current in a long straight wire, small flat coil and solenoid. Again, this revision is a reminder of pre-16 ideas and demonstrations. Students can look at som ...
Magnetism - University of Colorado Boulder
... Cross-Product Review: The cross-product of two vectors is a third vector A B C defined like this: The magnitude of A B is A B sin . The direction of A B is the direction perpendicular to the plane defined by the vectors A and B plus right-hand-rule. (Curl fingers from first vector A to seco ...
... Cross-Product Review: The cross-product of two vectors is a third vector A B C defined like this: The magnitude of A B is A B sin . The direction of A B is the direction perpendicular to the plane defined by the vectors A and B plus right-hand-rule. (Curl fingers from first vector A to seco ...
Physics AIEEE 2009 1.A block of mass M is pulled along a
... 2.When a force of IN acts on a 1 kg body that is able to move freely, the body receives a) a speed of 1 m/s b) an acceleration of 1 m/s2 c) an acceleration of 9.8 m/s2 d) a momentum of 9.8NS 3.A ship of mass 3×107kg initially at rest is pulled by a force of 5×104Nthrough a distance of 3m. Assuming t ...
... 2.When a force of IN acts on a 1 kg body that is able to move freely, the body receives a) a speed of 1 m/s b) an acceleration of 1 m/s2 c) an acceleration of 9.8 m/s2 d) a momentum of 9.8NS 3.A ship of mass 3×107kg initially at rest is pulled by a force of 5×104Nthrough a distance of 3m. Assuming t ...
class12
... A charge moving through a magnetic field experiences a force perpendicular to the field and the direction of motion of the charge The magnetic force is proportional to the charge, the magnitude of the field, the velocity of the charge, and the sine of the angle between v and B The effects of t ...
... A charge moving through a magnetic field experiences a force perpendicular to the field and the direction of motion of the charge The magnetic force is proportional to the charge, the magnitude of the field, the velocity of the charge, and the sine of the angle between v and B The effects of t ...
Test3_11_key
... series. The current is A) greater in the lamp with the thick filament. B) greater in the lamp with the thin filament. C) the same in each lamp. 32) (2 points) The source of all magnetism is A) tiny pieces of iron. B) tiny domains of aligned atoms. C) ferromagnetic materials. D) moving electric charg ...
... series. The current is A) greater in the lamp with the thick filament. B) greater in the lamp with the thin filament. C) the same in each lamp. 32) (2 points) The source of all magnetism is A) tiny pieces of iron. B) tiny domains of aligned atoms. C) ferromagnetic materials. D) moving electric charg ...
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.