## Principles of Electricity and Electromagnetism |

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Page 558

The validity of the approximation can be improved by placing a highly conducting

area or counterpoise over the surface of the ground in the neighborhood of the

base of the

...

The validity of the approximation can be improved by placing a highly conducting

area or counterpoise over the surface of the ground in the neighborhood of the

base of the

**antenna**. If the approximation is valid , the problem is reduced to that...

Page 568

8 The third factor has its maximum for the smallest value of h at had h = 4 sin s

These three equations permit the design of an

maximum signal for a particular frequency . If 8 is considered as the independent

...

8 The third factor has its maximum for the smallest value of h at had h = 4 sin s

These three equations permit the design of an

**antenna**which will produce themaximum signal for a particular frequency . If 8 is considered as the independent

...

Page 575

The effective height of an

it to the field strength of the electromagnetic wave . What is the effective height of

( a ) a vertical wire of length 1 erected on the surface of the earth , ( b ) a loop of ...

The effective height of an

**antenna**is defined as the ratio of the emf . generated init to the field strength of the electromagnetic wave . What is the effective height of

( a ) a vertical wire of length 1 erected on the surface of the earth , ( b ) a loop of ...

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angle applied approximately assumed atom axis becomes calculated capacity carrying cell characteristic charge circuit closed coil component condition conducting conductor connected considered constant curve density depends determined dielectric difference direction discharge discussion distance effective electric electrons element energy equal equation evident expression factor field flow flux force frequency function galvanometer given grid hence impedance important increases indicated induction integral ions known length limited linear load losses magnetic magnetic field magnitude maximum means measured mechanical metal meter method negative normal obtained oscillations parallel path period phase placed plate positive potential present produced proportional quantities radius ratio reduced region relation represents resistance respect result rotation seen separation Show shown simple solution space surface temperature terminals transformer tube unit vector volts volume wave wire written zero