## Principles of Electricity and Electromagnetism |

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Page 10

Thus the

by the

The relation between the relative rotation of the ends of the fiber and the

Thus the

**torque**produced by the electric force between the charges is balancedby the

**torque**of the fiber which is induced by the relative rotation of the two ends.The relation between the relative rotation of the ends of the fiber and the

**torque**...Page 396

changes the armature and field currents in opposite senses, is seen from the

equations to yield approximately the same speed control with a smaller change

in

in ...

changes the armature and field currents in opposite senses, is seen from the

equations to yield approximately the same speed control with a smaller change

in

**torque**. For starting a motor of this type a series resistance should be includedin ...

Page 415

The

>m cos ei,d6. Thus from Eqs. (12.19) and (12.20) the

given by T = <t>m cos 6 iť d6 r = tfmimj*2 cos 6 cos (0 + |3) dd ~2 = <t>mim^ COs

...

The

**torque**on a frame at an angle 6 with the flux and carrying a current i„d6 is <tt>m cos ei,d6. Thus from Eqs. (12.19) and (12.20) the

**torque**on the entire rotor isgiven by T = <t>m cos 6 iť d6 r = tfmimj*2 cos 6 cos (0 + |3) dd ~2 = <t>mim^ COs

...

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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 grad grid hence hysteresis 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 Show shown in Fig solenoid solution surface temperature terminals theorem torque tube unit vector velocity voltage volts wire written zero