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An 40-kW induction motor, with a lagging power factor of 0.76, is supplied by a 120-V rms 60-Hz sinusoidal voltage source. Find the capacitance needed in parallel with the motor to raise the power factor to:
(a) 0.9 lagging
(b) 1.0.
A rod on the surface of Jupiter's moon Callisto has a volume of 0.3 cubic meters. Determine the weigh of the rod in units of pounds-force. The specific gravity is 4.7 gravitational acceleration on Callisto is 1.25 meters per second squared.
Flip-flops must be in what mode (Set, Reset, Hold, or Toggle) in order to divide a clock's frequency when building a counter What is the advantage of a synchronous counter as compared to a ripple counter
A 10μF capacitor is charged by a constant current source and it's voltage is increased to 2V in 5s. Find the value of the constant current source.
(a) Determine the minimum required sampling rate fsamp(min). Hence, use twice this value. (b) Draw a block diagram of the system indicating the requirements of each block. (c) Design and write the difference equations of the digital filters needed.
a resistace heating element fed from an AC bus is controlledby an AC ( semi-conductor ) switch with integral half cyclecontrol. the base period is 20 half cycles of the AC supply.determine the number of half cycles
Find the transformation ratio of a transformer having 350 turns on the secondary winding and 7000 turns on the primary. What voltage must be applied to the primary of the transformer to develop an open-circuit secondary voltage
Calculate the total real and reactive power.
Determine a sinusoidal expression for the resultant v_R=v_1+v_2 by finding the horizontal and vertical components. Determine the resultant v_R=v_1-v_2 using horizontal and vertical components.
Design a state variable two-pole band-pass filter with a geometric center frequency of 2KHz and a 3dB bandwidth of 20 Hz and the tuning resistances need to be 10Kohms each.
The high-voltage windings are connected in Y with a solidly grounded neutral. Draw the per-unit zero-, positive-, and negative-sequence networks if the low-voltage wind- ings are connected: (a) in D with American standard phase shift
Design a circuit to supply a -2.5 reference voltage as the input to a voltage follower if only 9 V batteries are available. Use an In4740 diode, which has a Zener voltage of 10 v at a current of 25 mA.
the current through a 1.5 mH inductance is i = 2sin10^(6)t mA. find the voltage v, power p, and stored energy w. Plot them versus 10^(6)t for 0
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