## Principles of Electricity and Electromagnetism |

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Page 385

In this way a unidirectional current of essentially constant magnitude may be

produced. Such a machine is known as a

alternating and direct currents are widely used for the transmission of power.

Each system has ...

In this way a unidirectional current of essentially constant magnitude may be

produced. Such a machine is known as a

**directcurrent**generator. Bothalternating and direct currents are widely used for the transmission of power.

Each system has ...

Page 400

When a current is drawn from the armature, there is of course an armature

reaction as in the case of the

minimized by proper design. For a further discussion of alternator design

reference ...

When a current is drawn from the armature, there is of course an armature

reaction as in the case of the

**direct**-**current**machine, though its effects can beminimized by proper design. For a further discussion of alternator design

reference ...

Page 493

However, the use of the vacuum tube for the conversion of

earlier discussion of amplifiers in Sec. 7.7 was necessarily limited to voltage ...

However, the use of the vacuum tube for the conversion of

**direct**- to alternating-**current**power in general involves inductive circuits, and as a consequence theearlier discussion of amplifiers in Sec. 7.7 was necessarily limited to voltage ...

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