## Principles of Electricity and Electromagnetism |

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Page 42

It is found that the electric field toward the earth at its surface is 300

meter. Show that this implies that the earth has a surface charge density of –

0.00255 coulombs per kilometer*. , 11. The electric field 1,400 m. above the

earth's ...

It is found that the electric field toward the earth at its surface is 300

**volts**permeter. Show that this implies that the earth has a surface charge density of –

0.00255 coulombs per kilometer*. , 11. The electric field 1,400 m. above the

earth's ...

Page 136

A dry cell shows an emf. of 1.579

1000-ohm voltmeter is connected to its terminals, the meter reads 1.52

What is the internal resistance of the cell? 18. The emf. of a cell is measured by a

...

A dry cell shows an emf. of 1.579

**volts**as measured by a potentiometer. When a1000-ohm voltmeter is connected to its terminals, the meter reads 1.52

**volts**.What is the internal resistance of the cell? 18. The emf. of a cell is measured by a

...

Page 419

If the coils of a phase are in series and have 20 turns apiece, show that the

maximum flux through a coil must achieve the value 0.0343 webers to generate

an effective emf. of 2,200

induction ...

If the coils of a phase are in series and have 20 turns apiece, show that the

maximum flux through a coil must achieve the value 0.0343 webers to generate

an effective emf. of 2,200

**volts**. 11. Assuming a sinusoidal distribution of theinduction ...

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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