Magnetic Fields - Purdue Physics
... Magnetic Properties of Materials • Atoms in many materials act like magnetic dipoles. • Magnetization is the net dipole moment per unit ...
... Magnetic Properties of Materials • Atoms in many materials act like magnetic dipoles. • Magnetization is the net dipole moment per unit ...
Physics Lecture #34 - WordPress for academic sites @evergreen
... a) The current in the loop is clockwise and constant. What is the direction of the magnetic field at P? The current in the loop now alternates (CW, then CCW, then CW, etc.) b) What is the direction of the EM wave at the indicated point? c) What is the polarization direction of the magnetic field por ...
... a) The current in the loop is clockwise and constant. What is the direction of the magnetic field at P? The current in the loop now alternates (CW, then CCW, then CW, etc.) b) What is the direction of the EM wave at the indicated point? c) What is the polarization direction of the magnetic field por ...
Magnetic Torch - (EU
... What happens when shaking the test-tube? The magnet inside is moved, this automatically causes the movement of the magnetic field. Change of magnetic field causes current to be generated in the wire. It is worth noting that the diode does not light up before shaking the test-tube, that is, for curre ...
... What happens when shaking the test-tube? The magnet inside is moved, this automatically causes the movement of the magnetic field. Change of magnetic field causes current to be generated in the wire. It is worth noting that the diode does not light up before shaking the test-tube, that is, for curre ...
Electromagnetism: Home
... strength of the field. As long as you wrap it in the same direction, the field will continue to increase with each additional coil. Question 3: What would happen if we used a larger voltage source? We would be increasing the current and would thus have a more powerful electromagnet by Ampere’s law. ...
... strength of the field. As long as you wrap it in the same direction, the field will continue to increase with each additional coil. Question 3: What would happen if we used a larger voltage source? We would be increasing the current and would thus have a more powerful electromagnet by Ampere’s law. ...
Document
... Two small magnets are included in the plastic bag. Choose one of the magnets to be your reference magnet and draw a small mark on it. You are now going to investigate how various objects that you have around your home, including the other magnet, interact with your reference magnet. Class 1 will be ...
... Two small magnets are included in the plastic bag. Choose one of the magnets to be your reference magnet and draw a small mark on it. You are now going to investigate how various objects that you have around your home, including the other magnet, interact with your reference magnet. Class 1 will be ...
PHYS_2326_042109
... When materials are placed in a magnetic field, they get magnetized. In majority of materials, the magnetic effects are small. Some however show strong responses. ...
... When materials are placed in a magnetic field, they get magnetized. In majority of materials, the magnetic effects are small. Some however show strong responses. ...
questions with answers on electromagnetism
... Since Voltage = Current x Resistance (V = I*R), you can double the current in a wire by doubling the voltage of the source of electricity. Turns of coil If you wrap the wire into a coil, you increase the magnetic force inside the coil, proportional to the number of turns. In other words, a coil cons ...
... Since Voltage = Current x Resistance (V = I*R), you can double the current in a wire by doubling the voltage of the source of electricity. Turns of coil If you wrap the wire into a coil, you increase the magnetic force inside the coil, proportional to the number of turns. In other words, a coil cons ...
Force between magnets
Magnets exert forces and torques on each other due to the complex rules of electromagnetism. The forces of attraction field of magnets are due to microscopic currents of electrically charged electrons orbiting nuclei and the intrinsic magnetism of fundamental particles (such as electrons) that make up the material. Both of these are modeled quite well as tiny loops of current called magnetic dipoles that produce their own magnetic field and are affected by external magnetic fields. The most elementary force between magnets, therefore, is the magnetic dipole–dipole interaction. If all of the magnetic dipoles that make up two magnets are known then the net force on both magnets can be determined by summing up all these interactions between the dipoles of the first magnet and that of the second.It is always more convenient to model the force between two magnets as being due to forces between magnetic poles having magnetic charges 'smeared' over them. Such a model fails to account for many important properties of magnetism such as the relationship between angular momentum and magnetic dipoles. Further, magnetic charge does not exist. This model works quite well, though, in predicting the forces between simple magnets where good models of how the 'magnetic charge' is distributed is available.