## Principles of Electricity and Electromagnetism |

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Page 288

As an instance the axial field due to a

wire, can be found by integrating Eq. (9.11) over all the turns of the

9.12. — Magnetic field on the axis of a current-carrying loop. Section through the

...

As an instance the axial field due to a

**solenoid**, which is a closely wound helix ofwire, can be found by integrating Eq. (9.11) over all the turns of the

**solenoid**Fio.9.12. — Magnetic field on the axis of a current-carrying loop. Section through the

...

Page 302

Consider first a

near the center is to a good approximation uniform and equal to n'i. The flux

through the central region is then n0 An' i, where A is the cross-sectional area of

the ...

Consider first a

**solenoid**that is so long in comparison with its radius that the fieldnear the center is to a good approximation uniform and equal to n'i. The flux

through the central region is then n0 An' i, where A is the cross-sectional area of

the ...

Page 333

This procedure permits the determination of the ballistic constant of a

galvanometer by the use of a standard

^^ breaks the circuit through the

composed ...

This procedure permits the determination of the ballistic constant of a

galvanometer by the use of a standard

**solenoid**. The key K of Fig. 10.11 first a-^^^^ breaks the circuit through the

**solenoid**w^wv— (a] " and then breaks the circuitcomposed ...

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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