How are magnetic poles and electrical charges similar? How do charged plates affect the path of cathode rays? What happens when you put a charged object in an electric field? How does a Van de Graaff generator work? What is a common circuit in physics?
How are magnetic fields and electric fields related? How do electromagnetic waves interact with matter? How has physical chemistry changed the world? Why is particle physics important for understanding the early universe? Is modern physics the same as space physics?
Electromagnets are similar to other magnets in that they attract metal objects, but the magnetic pull is temporary. You can easily create a small electromagnet yourself by connecting the ends of a copper wire to the positive and negative ends of an AA, C or D-cell battery. This creates a ...
MRI machines are evolving so that they're more patient-friendly. For example, many claustrophobic people simply can't stand the cramped confines, and the bore may not accommodate obese people. There are more open scanners, which allow for greater space, but these machines have weaker magnetic ...
Magnets are objects that produce magnetic fields and attract metals like iron, nickel and cobalt. The magnetic field's lines of force exit the magnet from its north pole and enter its south pole. Permanent or hard magnets create their own magnetic field all the time. Temporary or soft ...
Electromagnetic FieldsNeoplasms, Radiation-InducedRadio Waves电磁场肿瘤, 辐射性无线电波Electrical power and mobile communications deliver enormous benefit to society, but there are concerns whether the electric and magnetic field (EMF) emissions associated with the delivery of this benefit are linked to ...
magnetic resonance imaging MIT Encyclopedia of Cognitive Sciences electrophysiology, electric and magnetic evoked fields multisensory integration magnetic resonance imaging neural plasticity positron emission tomography Glossary NEUROPLASTICITY The capacity of the nervous system to modify its organization. ...
The south end of the electromagnet would be repelled in a similar way. The nail would move half a turn and then stop in the position shown. You flip the magnetic field by changing the direction of the electrons. HowStuffWorks The key to an electric motor is to go one step further ...
Light is part of the electromagnetic spectrum — it's made of high-frequency electrical and magnetic waves. These waves are fairly complex, but you can imagine them as similar to waves on water. They have peaks and troughs, and they travel in a straight line until they encounter an ...
(b) How are the magnitudes of the electric and magnetic fields related to the velocity of the EM wave? View Solution A plane electromagnetic wave travels in vacuum along z-direction. What can you say about the direction of electric and magnetic field vectors? View Solution A plane electromagne...