Radio Communication, Theory and Methods, with an Appendix on Transmission Over Wires (Google eBook)

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McGraw-Hill book Company, 1917 - Radio - 205 pages
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Radio communication

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Page 27 - ... the coil is grasped in the right hand in such a way that the fingers point in the direction in which the current is flowing in the wires, the thumb will point in the direction of the north pole of the helix (see Fig.
Page 1 - Every body continues in a state of rest, or of uniform motion in a straight line, except in so far as it may be compelled by impressed forces to change that state.
Page 91 - Excitation, Impulse: A method of producing free alternating currents in an excited circuit in which the duration of the exciting current is short compared with the duration of the excited current.
Page 130 - The combined resistance of several resistances in parallel may be found by taking the reciprocal of the sum of the reciprocals of the individual resistances of the branch circuit.
Page 53 - ... by the movements of a spot of light reflected from a mirror attached to the needle.
Page 2 - Franklin who recognizing these two kinds of electrification introduced the terms "positive" and "negative." Franklin arbitrarily decided to call any body positively electrified if it is repelled by a glass rod which has been rubbed with silk; and...
Page 114 - ... are at right angles to each other and also at right angles to the direction of travel.
Page ii - Coal Age * Electric Railway Journal Electrical Uforld v Engineering News-Record American Machinist * The Contractor...
Page 180 - A shaft runs at 80 revolutions per minute: what is its angular velocity in radians per second...
Page 54 - I stated in the course of the paper, the heating effect is proportional to the square of the current and...

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