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suppose that we are designing a 1200-rpmdc motor to run from a 240-v source we have determined that the flux density
under no-load conditions a certain motor operates at 1200 rpm with an armature current of 05aand a terminal voltage of
a certain 25-hp three-phase induction motor operates from a 440-v-rms line-to-line three-phase source and draws a line
a three-phase induction motor is rated at 5 h p 1760 rpm with a line-to-line voltage of 220 v rms the motor has a power
consider a shunt-connected dc motor what are the names of the two windings which is on the stator on the rotor for
a generator with an output voltage of 2 mv has a generator output resistance of 75 omega it drives an amplifier with an
a two-stage amplifi er has these stage gains av1 258 and av2 117 what is the decibel voltage gain of each stage the
suppose that we want to design an amplifier that can produce a 100-khz sine-wave output having a peak amplitude of 5 v
consider two alternatives for designing an amplifier having a dc gain of 100 the first alternative is to use a single
we need a non-inverting amplifier that has a dc gain of 10 and the gain magnitude at 10 khz must be not less than 9
suppose that we design an inverting amplifier using 5-percent-tolerance resistors and an ideal op amp the nominal
consider the circuit shown in figurea find an expression for the output current io in terms of the source voltage and
consider the circuit shown in figurea find an expression for the output voltage in terms of the source current and
a certain op amp has an open-loop dc gain of a0ol 200 000 and an open-loop 3-db bandwidth of fbol 5hz this op amp is
sketch the output voltage of the circuit shown in figure to scale versus time sometimes an integrator circuit is used
consider the amplifier shown in figure p1461with zero dc input voltage from the signal source it is desired that the dc
find the worst-case dc output voltages of the inverting amplifier shown in figure for vin 0 the bias current ranges
an eight-pole 60-hz ac induction motor produces an output power of 2 h p and has rotational losses of 100 w at a speed
sketch the torque speed characteristic of a delta-connected 220-v-rms 5-hp four-pole 60-hz three-phase induction motor
consider the two-pole two-phase induction motor having two windings displaced 90deg in space shown in figurethe fields
suppose that we could use superconducting material for the rotor conductors ie rotor conductors with inductance and
in a proposed design for an electric automobile the shaft of a four-pole three-phase induction motor is connected
a four-pole induction motor drives a load at 2500 rpm this is to be accomplished by using an electronic converter to
consider the induction motor shown in figure redraw the figure showing the current directions in the rotor conductors