J.J. Thomson, Philos. Mag. 44, 293 Cathode Rays. J.J. Thomson
... rays to be determined. Under the action of the magnetic field the narrow beam of cathode rays spreads out into a broad fan–shaped luminosity in the gas. The luminosity in this fan is not uniformly distributed, but is condensed along certain lines. The phosphorescence on the glass is also not uniform ...
... rays to be determined. Under the action of the magnetic field the narrow beam of cathode rays spreads out into a broad fan–shaped luminosity in the gas. The luminosity in this fan is not uniformly distributed, but is condensed along certain lines. The phosphorescence on the glass is also not uniform ...
ABSTRACT
... are observed at about 20 millikelvin, revealing the formation of a Si SET at the Si/SiO2 interface. Based on a simple electrostatic model, the two SET islands are demonstrated to be closely aligned, with an inter-island capacitance approximately equal to 1/3 of the total capacitance of the Si transi ...
... are observed at about 20 millikelvin, revealing the formation of a Si SET at the Si/SiO2 interface. Based on a simple electrostatic model, the two SET islands are demonstrated to be closely aligned, with an inter-island capacitance approximately equal to 1/3 of the total capacitance of the Si transi ...
Subject: Electromagnetic Fields
... for the sign of the angle does not affect the cosine term. The expression A • B is read "A dot B." Perhaps the most common application of the dot product is in mechanics, where a constant force F applied over a straight displacement L does an amount of work FL cos 6, which is more easily written F • ...
... for the sign of the angle does not affect the cosine term. The expression A • B is read "A dot B." Perhaps the most common application of the dot product is in mechanics, where a constant force F applied over a straight displacement L does an amount of work FL cos 6, which is more easily written F • ...
J. J. Thomson (1856
... of German physicists they are due to some process in the aether to which--inasmuch as in a uniform magnetic field their course is circular and not rectilinear--no phenomenon hitherto observed is analogous: another view of these rays is that, so far from being wholly aetherial, they are in fact wholl ...
... of German physicists they are due to some process in the aether to which--inasmuch as in a uniform magnetic field their course is circular and not rectilinear--no phenomenon hitherto observed is analogous: another view of these rays is that, so far from being wholly aetherial, they are in fact wholl ...
PHy 184 lecture 14
... • The energy of a capacitor is qV/2; since V was reduced while q remained constant, the energy of the capacitor is lowered by inserting the dielectric into it. This means that the work was done by the capacitor+dielectric, ie, if we attached the left-hand side of the dielectric (the side outside the ...
... • The energy of a capacitor is qV/2; since V was reduced while q remained constant, the energy of the capacitor is lowered by inserting the dielectric into it. This means that the work was done by the capacitor+dielectric, ie, if we attached the left-hand side of the dielectric (the side outside the ...
J. SEMICONDUCTING AND METALLIC POLYMERS: THE FOURTH GENERATION OF POLYMERIC MATERIALS
... Processing high molecular weight polyaniline into useful objects and devices proved to be a difficult problem. Yong Cao, Paul Smith and I made important progress in 1991 by using functionalized protonic acids to both convert PANI to the metallic form and, simultaneously, render the the resulting PAN ...
... Processing high molecular weight polyaniline into useful objects and devices proved to be a difficult problem. Yong Cao, Paul Smith and I made important progress in 1991 by using functionalized protonic acids to both convert PANI to the metallic form and, simultaneously, render the the resulting PAN ...
H Graphene Field-Effect Transistors on Undoped Semiconductor Substrates for Radiation Detection
... Graphene is a monolayer of graphite with unique electronic properties [1]. Graphene has a high carrier mobility, reaching 10 times or greater than that of Si at room temperature [2]. Graphene is a low-noise electronic material and has a resistance, which is very sensitive to local change of carrier ...
... Graphene is a monolayer of graphite with unique electronic properties [1]. Graphene has a high carrier mobility, reaching 10 times or greater than that of Si at room temperature [2]. Graphene is a low-noise electronic material and has a resistance, which is very sensitive to local change of carrier ...
CCD Astronomy - Department of Physics and Astronomy
... is normally essential with backside illuminated CCDs if good blue response is required. Most blue photo-electrons are created within a few nanometers of the surface and if this region is field free, there will be no blue response. ...
... is normally essential with backside illuminated CCDs if good blue response is required. Most blue photo-electrons are created within a few nanometers of the surface and if this region is field free, there will be no blue response. ...
Electric charge
Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. There are two types of electric charges: positive and negative. Positively charged substances are repelled from other positively charged substances, but attracted to negatively charged substances; negatively charged substances are repelled from negative and attracted to positive. An object is negatively charged if it has an excess of electrons, and is otherwise positively charged or uncharged. The SI derived unit of electric charge is the coulomb (C), although in electrical engineering it is also common to use the ampere-hour (Ah), and in chemistry it is common to use the elementary charge (e) as a unit. The symbol Q is often used to denote charge. The early knowledge of how charged substances interact is now called classical electrodynamics, and is still very accurate if quantum effects do not need to be considered.The electric charge is a fundamental conserved property of some subatomic particles, which determines their electromagnetic interaction. Electrically charged matter is influenced by, and produces, electromagnetic fields. The interaction between a moving charge and an electromagnetic field is the source of the electromagnetic force, which is one of the four fundamental forces (See also: magnetic field).Twentieth-century experiments demonstrated that electric charge is quantized; that is, it comes in integer multiples of individual small units called the elementary charge, e, approximately equal to 6981160200000000000♠1.602×10−19 coulombs (except for particles called quarks, which have charges that are integer multiples of e/3). The proton has a charge of +e, and the electron has a charge of −e. The study of charged particles, and how their interactions are mediated by photons, is called quantum electrodynamics.