## Principles of Electricity and Electromagnetism |

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Page 60

The forces acting on a dipole in a field may be obtained most conveniently from

the energy point of view. Consider that the components of the dipole are first

coalesced at its center and that the positive charge is given a

and ...

The forces acting on a dipole in a field may be obtained most conveniently from

the energy point of view. Consider that the components of the dipole are first

coalesced at its center and that the positive charge is given a

**displacement**as 2and ...

Page 301

on the movable coil is measured by the angular

the restoring torque of a spiral spring. If this restoring torque is proportional to the

on the movable coil is measured by the angular

**displacement**of a pointer againstthe restoring torque of a spiral spring. If this restoring torque is proportional to the

**displacement**, the**displacement**is proportional to the product of the currents in ...Page 578

The extension of the theorem to three or more variables is obvious. e If f(x, y, z)

represents the energy of a particle as a function of the coordinates f(x, y, z) – f(x0,

y0, z0) represents the increase in energy for the

...

The extension of the theorem to three or more variables is obvious. e If f(x, y, z)

represents the energy of a particle as a function of the coordinates f(x, y, z) – f(x0,

y0, z0) represents the increase in energy for the

**displacement**from the point aro,...

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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