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q if the line of problem 1513 is made of copper whose resistivity rho 172times10-8 middotm determine the maximum length that can be used if losses
q if b and a are the radii of the outer and inner conductors respectively of a coaxial cable using a polyethylene dielectric epsilonr 226 what ratio
q a coaxial cable with polyethylene dielectric epsilonr 226 connects an antenna to a receiver 30maway determine the velocity of wave propagation in
q a 60-hz six-pole wye-connected three-phase induction motor with the parameters r1 r2 0025 and xl1 xl2 0125 is controlled by
q for a three-phase fully controlled rectier-fed separately excited dc motor corresponding to ideal no-load operation find the expression for the
q a consider a three-phase star or wye half-wave rectier with a purely resistive load r determine i efficiency ii formfactor iii ripplefactor iv tuf
q consider a full-wave single-phase bridge rectier circuit with dc motor load as shown in figure a let the transformer turns ratio be unitylet the
q admm digital multimeter reads true rms values of current if the peak value of each of the following periodic current waves is 5 a find the meter
q error specications on a 10-a digital ammeter are given as 007 of the reading 005 of full scale 0005 of the reading per degree celsius and 0002 of
q a current of 65 a is measured with an analog ammeter having a probable error of plusmn05 of full scale of 100 a find the maximum probablepercentage
q a transformer is rated 10 kva 220110 v rms consider it an ideal transformera compute the turns ratio and the winding current ratingsb if a 2-load
q a60-hz 100-kva 2400240-vrms transformer is used as a step-down transformer from a transmission line to a distribution system consider the
q consider a pair of coupled coils as shown in figure of the text with currents voltages and polarity dots as indicated show that the
q the inductance per unit length in hmfor parallel plate innitely long conductors in air is given by l micro0dw 4pitimes10-7 dw where d and w are
q the energy stored in a 2-microh inductor is given by wlt 9e-2t microj for t ge 0 find the inductor current and voltage at t 1
q let vt vmax cos omegat be applied to a a pure resistor b a pure capacitor with zero initial capacitor voltage and c a pure inductor with zero
q a practical current source is represented by an ideal current source of 200 ma along with a shunt internal source resistance of 12 k determine the
q a handbook lists the 60-hz resistance at 50degc of a 900-kcmil aluminumconductor as 01185mile if four such conductors are used in parallel to form
q mcm is the abbreviation for 1 kcmil problem for a denition of cmil data for commercial-base aluminum electrical conductors list a 60-hz resistance
q consider an amplier as a voltage source with an internal resistance of 72 find the turns ratio of the ideal transformer such that maximum power is
q a12-v 115-ah automobile storage battery is used to light a 6-w bulb assuming the battery to be a constant-voltage source find how long the bulb can
q a residence is supplied with a voltage vt 110radic2cos120pit vand a current it 10radic2cos120pit a if an electricmeter is used tomeasure the
q the voltage at terminal a relative to terminal b of an electric component is vt 20 cos 120pit v a current it -4 sin 120pit a ows intoterminal a
q acharge of 01cpasses through an electric source of 6 v from its negative to its positive terminals find the change in energy received by the charge
q a point charge q1 -5 nc is located at 6 0 0 compute the voltage vba between two points a1 0 0 and b5 0 0 comment on whether point a is at a higher