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alternating current amperes amplitude angular velocity applied p.d. applied potential difference axes axis capacity centimetres centre Chapter charge choking coil circle circuit coefficient concentric main conductors connected constant cosh cross section cubic centimetre cylinder direct current disc earth eddy current losses eddy currents effective value electric electromagnetic electromotive force electrostatic energy equal equation equipotential surfaces flux follow the harmonic formula frequency given harmonic law Hence hysteresis infinite instantaneous value insulated iron lines of force magnetic field magnetic force magnetising magnitude maximum value mean value mesh method minimum mutual inductance non-inductive resistance perpendicular phase difference plane polyphase potential difference power expended power factor practice radius represented resultant right angles rotating sheath shunt Similarly sine curve star load suppose terminals theorem three core cable three phase torque triangle tube of force voltage voltmeter watt-hour meter wattmeter zero
Page 100 - Plot the locus of a point which moves so that the ratio of its distances from two fixed points remains constant.
Page 27 - It differs from the dynamo rule, only 'in that it is applied to the fingers of the left hand instead of to those of the right. Let the forefinger of the left hand point in the direction of the magnetic lines of force and the middle finger in the direction of the current sent through the wire; the thumb will then point in the direction of the mechanical force acting to move the wire (see Fig.
Page 222 - ... any one of them is equal and opposite to the resultant of the other two.
Page 13 - COS ~ (vt ~ r) in which a is the angle between the direction of the force and the radius vector, r, that connects the centre of the force with the point at which the displacement is observed. On substituting for the force F cos — jp- its value, one finds that . D...
Page 91 - The Capacity of a conductor is its charge when its own potential is unity, and that of all the other conductors is zero.
Page 11 - Coulomb- -the force between two magnetic poles is proportional to the product of the strengths of the poles and inversely proportional to the square of the distance between them.
Page 210 - ... us before this Society on March 6th it was pointed out that for every problem involving alternate P.Ds. in series there was an analogous problem involving alternate currents in parallel. This general proposition tells us that we can transform each of the PD equations given, for example, in our paper on " The Measurement of the Power given by any Electric Current to any Circuit...