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Suppose that the cost of electrical energy is $0.12 per kilowatt hour and that your electric bill for 30 days is $60 (power usage only, not including other charges or taxes) Assume that the power delivered is constant over the entire 30 days. What is the power in watts? If a voltage of 120 V supplies this power, what current flows? Part of your electrical load is a 60-W light that is on continuously. By what percentage can your energy consumption be reduced by turning this light off?
Let the random variable X denote the annual snow fall amount at a well known Utah ski resort. X has a normal distribution with mean 500 inches and standard deviation 50 inches. (a) What is the probability that in a given year the snow fall will be ..
1.The Thyristor is a natural commutation device. What does that mean. 2.Mention two reasons why the HVDC might be your choice as a power system designer to transfer large amount of power.
Design a Double Sideband Amplitude Modulation (DSBAM) modulator and demodulator system using the SystemView software. The modulating wave m(t) = Amcos(2pifmt) and the carrier wave c(t) = Accos(2?fct) have the following parameters
A junction is an n region next to an intrinsic region, which can be represented as an ntype region to a p-type lightly doped region. At T= 300K, the doping concentrations in silicon are Nd =1018 cm-3 and Na= 1013 cm-3.
What is the efficiency of an AM transmitter if it outputs 10 W of power to a 50 Ώ load while drawing 1 amp from a 12
What is the maximum power dissipated in the load when the Thévenin voltage is 21 V cos(52 rad/s t + 82°), the Thévenin impedance is 102 -j 184 ohm and the load impedance is 102 + j 184 ohm
A single silicon photovoltaic cell is found to have an open-circuit voltage of 0.6 V and a short-circuit current of 15 mA in full sunlight. Show how a collection of these cells can be arranged to deliver 500mW at 9.0V into a load.
A balanced Y-connected power system is known to have Van=100
An induction motor has an output or shaft power of 30 kW at 86% efficiency. For this operatingcondition, stator copper loss = rotor copper loss = core loss = mechanical rotational losses. Determine the slip.
what would the relative sensitivity of the IR detector be if you use FREQOUT to send a 35 kHz harmonic? What is the relative sensitivity with a 36 kHz harmonic?
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.
Determine the relative permittivity of the dielectric, the maximum and minimum electric field intensities in medium 1 and the electric field intensity in medium 2.
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