UNIT 2 THE BODY
... MAGNETS HAVE TO POLES: NORTH AND SOUTH Opposite poles attract. Same poles repel LIKEWISE ELECTRICAL CHARGES ...
... MAGNETS HAVE TO POLES: NORTH AND SOUTH Opposite poles attract. Same poles repel LIKEWISE ELECTRICAL CHARGES ...
Magnetic Fields - Fanatical Physicists
... We have seen that a charge moving across magnetic field lines will experience a deflecting force. We can use this property to create or “induce” electric current when wires and coils are mechanically moved through magnetic fields. The charges in the wires and coils are then deflected so that they fl ...
... We have seen that a charge moving across magnetic field lines will experience a deflecting force. We can use this property to create or “induce” electric current when wires and coils are mechanically moved through magnetic fields. The charges in the wires and coils are then deflected so that they fl ...
Ch 21 PowerPoint Notes
... the center of the loop points right to left through the loop. Multiple loops in the wire make a coil. The magnetic fields of the loops combine so that the coiled wire acts like a bar ...
... the center of the loop points right to left through the loop. Multiple loops in the wire make a coil. The magnetic fields of the loops combine so that the coiled wire acts like a bar ...
Homework for the week of November 3. 6th week of... Ch. 27: 6, 8, 16, 20, 23, 33, 35, 36
... maximum magnetic force is applicable since the wire is perpendicular to the magnetic field. The mass of the wire is the density of copper times the volume of the wire. FB = mg → I l B = ρπ ( 12 d ) l g → ...
... maximum magnetic force is applicable since the wire is perpendicular to the magnetic field. The mass of the wire is the density of copper times the volume of the wire. FB = mg → I l B = ρπ ( 12 d ) l g → ...
Magnetic Field
... and on the arc of an angle 2π − α and then sum them up. The force acting on the arc The magnetic field induced by the infinite wire is in the φ̂ direction and so is the element d~l = rdφφ̂. Then the force and the torque are zero. The force acting on the cord Using the Biot - Savart’s law we can calc ...
... and on the arc of an angle 2π − α and then sum them up. The force acting on the arc The magnetic field induced by the infinite wire is in the φ̂ direction and so is the element d~l = rdφφ̂. Then the force and the torque are zero. The force acting on the cord Using the Biot - Savart’s law we can calc ...
Magnetic Fields - Lone Star College
... Field is stronger near poles, weakens with distance Spacing of lines indicates magnitude of vector B Field lines continue within the body of a magnet; always form closed loops (so never cross) Direction of magnetic field vector at any point on the line is tangent to the line Direction: lea ...
... Field is stronger near poles, weakens with distance Spacing of lines indicates magnitude of vector B Field lines continue within the body of a magnet; always form closed loops (so never cross) Direction of magnetic field vector at any point on the line is tangent to the line Direction: lea ...
Torque on Current Loop
... v⊥ = v sinφ contributes to circular motion v|| = v cosφ is unchanged ...
... v⊥ = v sinφ contributes to circular motion v|| = v cosφ is unchanged ...
Magnetic Fields ch 20
... The same idea applies to a charged object crossing a magnetic field (like a charged duck flying across the earth’s magnetic field) F = qvBsinө, q = charge (coulombs), v = velocity, B = magnetic field (Tesla). Again, when the angle = 90, the charge is crossing the magnetic field lines and is a maximu ...
... The same idea applies to a charged object crossing a magnetic field (like a charged duck flying across the earth’s magnetic field) F = qvBsinө, q = charge (coulombs), v = velocity, B = magnetic field (Tesla). Again, when the angle = 90, the charge is crossing the magnetic field lines and is a maximu ...
ANOTES tek200.qxd
... accepted convention is that magnetic flux flows from the north pole of a magnet to the south pole of a magnet. The polarity of a magnet, therefore, is defined by the polarity of this magnetic flux. The north pole of a bar magnet is the end which tries to point to the North Pole of the Earth, (the co ...
... accepted convention is that magnetic flux flows from the north pole of a magnet to the south pole of a magnet. The polarity of a magnet, therefore, is defined by the polarity of this magnetic flux. The north pole of a bar magnet is the end which tries to point to the North Pole of the Earth, (the co ...
eassy - BSE8J2009
... But why does that happen? To find the answer, we must look further away, to the Sun. The spectacular, "great" auroras in "what do they look like?” are powered by what is called the solar wind. The Sun also has an atmosphere and a magnetic field that extend into space. The Sun's atmosphere is made of ...
... But why does that happen? To find the answer, we must look further away, to the Sun. The spectacular, "great" auroras in "what do they look like?” are powered by what is called the solar wind. The Sun also has an atmosphere and a magnetic field that extend into space. The Sun's atmosphere is made of ...
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.