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When and electric
When a metal wire is subjected to electric force applied on its opposite ends, these free electrons rush in the direction of the force, thus forming what we call an electric current.
When a metal wire is connected across the two terminals of a DC voltage source such as a battery, the source places an electric field across the conductor.
When oscillating electric currents flow at the correct voltages within radio antennas, radio waves are generated.
When placed in an electric or magnetic field, equal but opposite forces arise on each side of the dipole creating a torque τ:
When any wire ( or other conducting object such as an antenna ) conducts alternating current, electromagnetic radiation is propagated at the same frequency as the electric current.
When EM radiation at the frequences for which it is referred to as " radio waves " impinges upon a conductor, it couples to the conductor, travels along it, and induces an electric current on the surface of the conductor by moving the electrons of the conducting material in correlated bunches of charge.
When the net electric charge of an object is non-zero and motionless, the phenomenon is known as static electricity.
When a pedal is off or inactive, the electric audio signal coming in to the pedal is diverted onto a " bypass ", resulting in a " dry " signal which continues on to other effects down the chain.
When Godzilla tries to kill Kong with his atomic breath, an electrical storm arrives and revives Kong, giving him the power of an electric grasp.
When the electric current is applied, the larger molecules move more slowly through the gel while the smaller molecules move faster.
When the electric field applied across an insulating substance exceeds in any location the threshold breakdown field for that substance, the insulator suddenly becomes a conductor, causing a large increase in current, an electric arc through the substance.
When asked why he didn't name the album " Electric Church " instead of " Electric Ladyland ", Hendrix said some ladies were " electric too ".
When guitarist Charlie Christian used the amplified electric guitar to improvise horn-like, single-line melodies in the jazz context, jazz and blues musicians became interested in the potential of the louder, new electric guitar.
When voltage is applied, the liquid crystals shift to a tilted position allowing light to pass through and create a gray-scale display depending on the amount of tilt generated by the electric field.
When physical chemist Richard Williams applied an electric field to a thin layer of a nematic liquid crystal at 125 ° C, he observed the formation of a regular pattern that he called domains ( now known as Williams Domains ).
When an external electric field is applied to the liquid crystal, the dipole molecules tend to orient themselves along the direction of the field.
When an electric field is applied to the LC layer, the long molecular axes tend to align parallel to the electric field thus gradually untwisting in the center of the liquid crystal layer.
When Guericke held his hand against the ball and turned the shaft quickly, a static electric charge built up.
When the prototype electric pickup they were developing finally worked to his satisfaction, Beauchamp asked former National shop craftsman Harry Watson to make a wooden neck and body to which the electronics could be attached.
When an electric current is passed through the coil it generates a magnetic field that activates the armature, and the consequent movement of the movable contact ( s ) either makes or breaks ( depending upon construction ) a connection with a fixed contact.
When they employed them in parallel connected electric distribution systems, closed-core transformers finally made it technically and economically feasible to provide electric power for lighting in homes, businesses and public spaces.

When and field
When some question arises in the medical field concerning cancer, for instance, we do not turn to free and open discussion as in a political campaign.
When this occurs, I make the change on the sketch or on the final watercolor -- if I have been working on a full sheet in the field.
When the ballplayers started to carry the catcher off the field he said: `` That ought to teach the sonofabitch ''.
When a beam of silver atoms was passed through a specially shaped magnetic field, the beam was split based on the direction of an atom's angular momentum, or spin.
When it finally sank in, the crowd swarmed onto the field, cheering loudly and chairing Boyle and Spofforth to the pavilion.
When the Viking raids resumed in 892, Alfred was better prepared to confront them with a standing, mobile field army, a network of garrisons, and a small fleet of ships navigating the rivers and estuaries.
When the Vikings returned in force in 892 they found a kingdom defended by a standing, mobile field army and a network of garrisoned fortresses that commanded its navigable rivers and Roman roads.
When questioned on why she followed Thomas to the second job after he had already allegedly harassed her, she said she had wanted to work in the civil rights field, she had no alternative job, " and at that time, it appeared that the sexual overtures ... had ended.
When artificial intelligence came into existence in the 1960s, the field of computational linguistics became that sub-division of artificial intelligence dealing with human-level comprehension and production of natural languages.
When this field is instead studied using the QED vacuum of quantum electrodynamics, it is seen that the plates do affect the virtual photons which constitute the field, and generate a net force either an attraction or a repulsion depending on the specific arrangement of the two plates.
When the evolution map Φ < sup > t </ sup > ( or the vector field it is derived from ) depends on a parameter μ, the structure of the phase space will also depend on this parameter.
When the current changes, the magnetic field does too, inducing a voltage between the ends of the conductor.
When a field travels across to different media, the properties of the field change according to the various boundary conditions.
Using the principle of equivalence, Einstein concluded that the same thing holds in any gravitational field, that the rate of clocks R at different heights was altered according to the gravitational field g. When g is slowly varying, it gives the fractional rate of change of the ticking rate.
When the ball is played on the right side of the field, the defensive players on the right side move upfield.
When the flow is everywhere irrotational and inviscid, Bernoulli's equation can be used throughout the flow field.
When calculating scattering cross sections in particle physics, the interaction between particles can be described by starting from a free field which describes the incoming and outgoing particles, and including an interaction Hamiltonian to describe how the particles deflect one another.
When these tiny magnetic dipoles are aligned in the same direction, their individual magnetic fields add together to create a measurable macroscopic field.
When the temperature rises beyond a certain point, called the Curie temperature, there is a second-order phase transition and the system can no longer maintain a spontaneous magnetization, although it still responds paramagnetically to an external field.
When they first met, he was standing on his head in a field.

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