Guess Paper – 2010 Class – X Subject – Science A metal surface
... Explain why does a metal wire when connected to a cell offer resistance to the flow of current. State the S.I. unit of resistance. How are the potential difference (V), current (I) and resistance (R) related? 'The resistance of a wire is 1 ohm'. Explain the meaning of this statement. How is the curr ...
... Explain why does a metal wire when connected to a cell offer resistance to the flow of current. State the S.I. unit of resistance. How are the potential difference (V), current (I) and resistance (R) related? 'The resistance of a wire is 1 ohm'. Explain the meaning of this statement. How is the curr ...
Soft and Hard Magnetic Materials:- Ferromagnetic
... have unpaired electrons and hence have permanent magnetic moments due to electron spin. The permanent magnetic moments present on individual atoms/ molecules in ferromagnetic materials due to exchange interaction couplings are aligned permanently in one direction even in the absence of an external f ...
... have unpaired electrons and hence have permanent magnetic moments due to electron spin. The permanent magnetic moments present on individual atoms/ molecules in ferromagnetic materials due to exchange interaction couplings are aligned permanently in one direction even in the absence of an external f ...
Starter
... to decide what the questions should be. This can be done orally or in writing. Possible questions for the answers provided are: 1 Name three magnetic metals. ...
... to decide what the questions should be. This can be done orally or in writing. Possible questions for the answers provided are: 1 Name three magnetic metals. ...
2-17 Magnetic Field: Causes
... magnetic field is essentially zero. In some atoms, such as iron, cobalt, and neodymium, the various contributions to the magnetic field do not cancel out. In such cases, the observed total magnetic field of the atom is a dipole magnetic field, and, the atom behaves as a magnetic dipole. Substances c ...
... magnetic field is essentially zero. In some atoms, such as iron, cobalt, and neodymium, the various contributions to the magnetic field do not cancel out. In such cases, the observed total magnetic field of the atom is a dipole magnetic field, and, the atom behaves as a magnetic dipole. Substances c ...
Magnetic.. - PhysicsEducation.net
... Where will be changing, and where will it be nearly constant? ...
... Where will be changing, and where will it be nearly constant? ...
Electric, magnetic and electromagnetic sensors and
... We can say that a “field” exists around the magnet through which it interacts. This force field is in fact the magnetic field. The same can be observed by driving a current through a coil Since the two fields are identical, their sources are identical - currents generate magnetic fields ...
... We can say that a “field” exists around the magnet through which it interacts. This force field is in fact the magnetic field. The same can be observed by driving a current through a coil Since the two fields are identical, their sources are identical - currents generate magnetic fields ...
Exam 3: Problems and Solutions
... 2. A source injects an electron of speed v = 2 × 102 m/s into a region with a uniform magnetic field of magnitude Find the distance, d, B = 1 × 10−3 T. The velocity of the electron makes an angle θ = 20◦ with the direction of B. from the point of injection at which the electron next crosses the fiel ...
... 2. A source injects an electron of speed v = 2 × 102 m/s into a region with a uniform magnetic field of magnitude Find the distance, d, B = 1 × 10−3 T. The velocity of the electron makes an angle θ = 20◦ with the direction of B. from the point of injection at which the electron next crosses the fiel ...
CHAPTER 27: MAGNETIC FIELD AND MAGNETIC FORCES
... • Magnetic phenomena involve the interaction of moving electric charges • A moving charge (or charges, for an electric current) alters the space around it, producing a magnetic field. A second moving charge (or current) experiences a magnetic force as a result of moving thru this magnetic field. • T ...
... • Magnetic phenomena involve the interaction of moving electric charges • A moving charge (or charges, for an electric current) alters the space around it, producing a magnetic field. A second moving charge (or current) experiences a magnetic force as a result of moving thru this magnetic field. • T ...
2010 Japan Prizes Awarded to Prof. Shun
... approximately 100-year history, with the perpendicular magnetic recording method, it was necessary to start research on the magnetic heads and recording media from scratch. In addition, there were technical innovations with the horizontal magnetic recording method as well, and higher capacity storag ...
... approximately 100-year history, with the perpendicular magnetic recording method, it was necessary to start research on the magnetic heads and recording media from scratch. In addition, there were technical innovations with the horizontal magnetic recording method as well, and higher capacity storag ...
Magnetic field
... The strength of the magnetic field is proportional to the current in the wire. If you double the current, the magnetic force is doubled. 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 wra ...
... The strength of the magnetic field is proportional to the current in the wire. If you double the current, the magnetic force is doubled. 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 wra ...
Ripplon-induced tunneling transverse to the magnetic field P. M. Platzman
... The first two terms in the operator V̂ q describe a kinematic interaction with ripplons which is due to the curvature of the surface on which the electron wave function is set equal to 0. The polarization interaction K q(z) is given in Ref. 7. The kinematic interaction turns out to be more important ...
... The first two terms in the operator V̂ q describe a kinematic interaction with ripplons which is due to the curvature of the surface on which the electron wave function is set equal to 0. The polarization interaction K q(z) is given in Ref. 7. The kinematic interaction turns out to be more important ...
Chapter 10
... Let us now step back and consider what we have learnt so far about spin. Spin is the intrinsic angular momentum carried by elementary particles, and for spin 1/2 particles such as electrons and protons spin is described by a qubit. But how do we reconcile this unit vector in an abstract vector space ...
... Let us now step back and consider what we have learnt so far about spin. Spin is the intrinsic angular momentum carried by elementary particles, and for spin 1/2 particles such as electrons and protons spin is described by a qubit. But how do we reconcile this unit vector in an abstract vector space ...
Giant magnetoresistance
Giant magnetoresistance (GMR) is a quantum mechanical magnetoresistance effect observed in thin-film structures composed of alternating ferromagnetic and non-magnetic conductive layers. The 2007 Nobel Prize in Physics was awarded to Albert Fert and Peter Grünberg for the discovery of GMR.The effect is observed as a significant change in the electrical resistance depending on whether the magnetization of adjacent ferromagnetic layers are in a parallel or an antiparallel alignment. The overall resistance is relatively low for parallel alignment and relatively high for antiparallel alignment. The magnetization direction can be controlled, for example, by applying an external magnetic field. The effect is based on the dependence of electron scattering on the spin orientation.The main application of GMR is magnetic field sensors, which are used to read data in hard disk drives, biosensors, microelectromechanical systems (MEMS) and other devices. GMR multilayer structures are also used in magnetoresistive random-access memory (MRAM) as cells that store one bit of information.In literature, the term giant magnetoresistance is sometimes confused with colossal magnetoresistance of ferromagnetic and antiferromagnetic semiconductors, which is not related to the multilayer structure.