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a simple relaxation oscillator circuit is shown in fig 7137 the neon lamp fires when its voltage reaches 75 v and turns
figure 7138 shows a circuit for setting the length of time voltage is applied to the electrodes of a welding machine
a 120-v dc generator energizes a motor whose coil has an inductance of 50 h and a resistance of 100 omega a field
to move a spot of a cathode-ray tube across the screen requires a linear increase in the voltage across the deflection
an oscillogram can be adequately modeled by a second-order system in the form of a parallel rlc circuit it is desired
a mechanical system is modeled by a series rlc circuit it is desired to produce an overdamped response with time
the oscillator circuit in fig 10110 uses an ideal op ampa calculate the minimum value of ro that will cause oscillation
calculate the power factor of the entire circuit of fig 1119 as seen by the source what is the average power supplied
in the circuit in fig 1125 the 60-omega resistor absorbs an average power of 240 w find v and the complex power of each
in the circuit of fig 114 calculate the average power absorbed by the resistor and inductor find the average power
find the rms value of the current waveform of fig 1115 if the current flows through a 9-omega resistor calculate the
find the value of parallel capacitance needed to correct a load of 140 kvar at 085 lagging pf to unity pf assume that
a load draws 5 kvar at a power factor of 086 leading from a 220-v rms source calculate the peak current and the
a relay coil is connected to a 210-v 50-hz supply if it has a resistance of 30 omega and an inductance of 05 h
one cycle of a periodic voltage waveform is depicted in fig 1161 find the effective value of the
consider the power system shown in fig 1180 calculatea the total complex powerb the power factorc the capacitance
the circuit of fig 1184 portrays a wattmeter connected into an ac networka find the load currentb calculate the
the kilowatthour-meter of a home is read once a month for a particular month the previous and present readings are as
a consumer has an annual consumption of 1200 mwh with a maximum demand of 24 mvathe maximum demand charge is 30 per kva
in a tv transmitter a series circuit has an impedance of 3 komega and a total current of 50 ma if the voltage across
a certain electronic circuit is connected to a 110-v ac line the root-mean-square value of the current drawn is 2 a
an industrial heater has a nameplate which reads 210 v 60 hz 12 kva 078 pf lagging determinea the apparent and the
a 2000-kw turbine-generator of 085 power factor operates at the rated load an additional load of 300 kw at 08 power
the nameplate of an electric motor has the following informationline voltage 220 v rmsline current 15 a rmsline
as shown in fig 1185 a 550-v feeder line supplies an industrial plant consisting of a motor drawing 60 kw at 075 pf