## Principles of Electricity and Electromagnetism |

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Page 299

following way: The change in magnetic energy of a circuit carrying a current i

when the

do The magnetic-

following way: The change in magnetic energy of a circuit carrying a current i

when the

**flux**through it changes by an amount do is given by Eq. (9.20) as d'U = ido The magnetic-

**flux**density B is everywhere proportional to the current so the**flux**...Page 371

Alloys containing about 80 per cent iron and 20 per cent nickel, known as

permalloys, show very high permeabilities at low

hysteresis losses are small. The addition of a few per cent of chromium or

molybdenum ...

Alloys containing about 80 per cent iron and 20 per cent nickel, known as

permalloys, show very high permeabilities at low

**flux**densities. Also theirhysteresis losses are small. The addition of a few per cent of chromium or

molybdenum ...

Page 468

The permanent polarization of the armature should be large since the permanent

instrument. Similarly, the air gap should be small, subject of course to the

restriction ...

The permanent polarization of the armature should be large since the permanent

**flux**plays the same role here as does the constant potential in the condenserinstrument. Similarly, the air gap should be small, subject of course to the

restriction ...

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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