## Principles of Electricity and Electromagnetism |

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Page 264

A variation in either the amplitude or

average anode current. Both these methods are used in Vblts /Breakdown grid '

potential corresponding to the existing plate potential Conducting period

Conducting ...

A variation in either the amplitude or

**phase**of the grid wave will affect theaverage anode current. Both these methods are used in Vblts /Breakdown grid '

potential corresponding to the existing plate potential Conducting period

Conducting ...

Page 408

Polyphase line connections, (a) Two

distribution. (o) Three-

wire distribution L. In two- and three-

entirely separate ...

Polyphase line connections, (a) Two

**phase**generator, three-wire powerdistribution. (o) Three-

**phase**generator; (c) three-wire distribution A; (d) three-wire distribution L. In two- and three-

**phase**circuits the**phases**may be keptentirely separate ...

Page 410

Transformers can also be used for the interconversion of two- and three-

circuits. Two transformers are required in what is known Fig. 12.24. — Scott-

connected transformers for the interconversion of two- and three-

as a ...

Transformers can also be used for the interconversion of two- and three-

**phase**circuits. Two transformers are required in what is known Fig. 12.24. — Scott-

connected transformers for the interconversion of two- and three-

**phase**current.as a ...

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### Common terms and phrases

alternating current alternating-current ampere amplifier amplitude angle angular anode antenna applied approximately armature assumed atom axis calculated capacity cathode cell characteristic charge circuit coefficient coil component condenser conducting conductor considered constant curl current flowing curve deflection density determined dielectric dielectric constant direct-current direction discharge effective electric field electromagnetic electromotive force electrons electrostatic element energy equal equation flux force frequency function galvanometer given grid hence impedance induction integral ions known Laplace's equation length linear load magnetic field magnetic induction magnitude maximum measured metal meter negative normal obtained ohms oscillations output parallel phase plane plate polarization positive potential difference potential wave potentiometer produced proportional quantities radiation radius ratio reactance region represents resistance resonant rotation scalar Show shown in Fig solenoid solution surface temperature terminals theorem torque tube unit vector velocity voltage volts wire written zero