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We have a transformer designed to operate at 60Hz. The voltage ratings are 4800v rms and 240v rms for the primary and secondary windings, respectively. The transformer is rated to 10KVA. Now we want to use this transformer at 120Hz. Discuss the factors that must be considered in setting ratings appropriate for operation at the new frequency.
An insurance company has made you the following retirement offer. If you pay them $100,000 now, you will receive payments of $8000 a year for 10 years. After this they will pay you $9000 a year in perpetuity (for ever).
a) Find the code word transmitted when the data word is 101100011011. b) Draw the LFSR circuit to generate the CRC. Generate the CRC by applying the data pattern to the LFSR and verify the answer in part a.
Discuss the sequence of actions that occur in the operation of the control system for a traffic light that includes sensors in the roadbed. Indicate which actions are time-driven and which actions are event-driven.
The open circuit test on a single-phase 15kVA, 7500/480 V, 60 Hz distribution transformer yielded the following: V = 7500V; I = 0.2006A; P = 180W Calculate the core parameters RC and XM and the magnetizing current IM.
A student from electromechanical systems class planned to construct a transformer that will cause an actual load resistance of 98.5 ohms to appear as 172.8 ohms to an AC voltage source of 176 V rms.
An open-circuited 50 Ohm microstrip transmission line is used in a microwave amplifier circuit to provide a capacitance of 3.2 pF at 2.3 GHz. (a) Find the appropriate electrical length of the line and (b) Find the lumped element values of the open..
What RF bandwidth must the radio link provide if the modulation is binary phase shift keying (BPSK)?
How would you develop a looping program in MIPS that will take a series of decimal numbers and arrange them in ascending order from smallest to largest. The sequence of nine numbers are: 5, 3, 8, 9, 2, 4, 1, 7, 6, 3, 8
The 16giga-byte (GB=2^30 bytes) flash memory chip for an MP3player is 11mm by 15mm by 1mm. This memory chip holds 20,000photos. a) How many photos fit into a cube whose sides are 1mm
A 220V dc series motor runs at 700 rev/min when operating at its full-load current of 20A. The motor resistance is 0.5W and the magnetic circuit may be assumed unsaturated. What will be the speed if: (i) the load torque is increased by 44
A unipolar 16 bit ADC measures 0-10 volts full scale. a) What is the minimum resolvable voltage b) What is the percent quantization error c) What is the percent quantization error if a 1 volt max signal is input
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
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