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Find the frequency of a repeating waveform whose period isa. 1/60 s.
b. 0.01 s.
c. 34 ms.
d. 25 ms.
What would the rating of this transformer be if it were operated on a 50-Hz power system? Sketch the equivalent circuit of this transformer referred to the primary side if it is operating at 50 Hz.
if a 2 Watts resistor is dissipating less than or equal to its rated capacity with an applied voltage of 6 Volts, what could be the value of the resistor
What do you understand by the terms "hogging" and "sagging" in relation to longitudinal strength? Explain how you would go about finding the longitudinal bending moment amidships of a ship:
What is a semiconductor? - How does it compare with a conductor and an insulator?
A beam has a solid square cross section of 100mm and is simply supported by two supports 3m apart. Calculate the dead load that can be safely supported when applied to the middle of the beam. Assuming material of the beam is mild steel.
The following tests are performed on a single phase transformer rated 30/6.3 KV , 10 MVA , 50 HZ i- Short circuit test with L.V side short circuited and measurement made on H.V side I = I full load , V = 2700 V , P 80 KW
Calculate the parameters RE and XE, and the maximum efficiency and power output for the transformer when a load with a 90% lagging power factor is connected to the transformer secondary winding.
100 kg of a certain gas is contained within a piston-cylinder assembly. the gas undergoes a processwhich the pressure volume relationship is (PV)^n = constant. The initial pressure is 6 bars, the initial volume is 0.2 cubic meters
You must design a three axis position indicator for the latest robot arm. Using no more than two operational amplifiers, design a circuit that uses three inputs, v1, v2, and v3 to produce an output signal vo=3 v1-2 v2-5 v3.
TDMA has 416 frequencies in one of the cellular license bands. If a cellular operator designs a network with a 5/15 reuse pattern, how many frequencies per cell (sector) can be supported? ( ignore control channels)
A new phone company wants to provide very cheap voice-only cell phone capability to 200,000 simultaneous users in San Francisco. They transmit only 8kbs per duplex channel using FDMA (frequency division multiple access) and BPSK (1 bit/Hz).
1) Modern technology has produced a small 1.5-volt alkaline battery with a nominal stored energy of 150 joules. For how many days will it power a calulator that draws a 2-mA current 2)The current entering the positive terminal of an element is
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