Electrical Engineering Answers

What are the applications of disk method in ELECTRICAL ENGINEERING

cycle operating system between 307 and 17 degree Celsius the maximum and minimum pressures are 60 2.4 and 1.04. calculate the cycle efficiency and the work ratio. assume air to be the working fluid

Two coils A and B are so placed that 80% of the total Flux produced by one links the other. A has 2000 turns and B has 3000 turns. When the current in A is changing at a rate of 500A/s,the Flux linking it,is changing at the rate of 1m wb/s, calculate,
a)the corresponding EMF induced in each coil
b) the self inductance of each coil
c) the mutual inductance of each coil
d) the effective inductance of the two coils in series

The pressure, volume and temperature at the beginning of the compression of a constant cycle are 101 kilo Newton per metre square, 0.003m cube and 18 degrees Celsius respectively. The maximum pressure of the cycle is 4.5Mega Newton per metre square. The volume ratio of the circle is 9.1. the cycle is repeated 3000 times a minute. Determine for the cycle;
a) the pressure volume and temperature at each of the cycle process change points
b) the thermal efficiency
c) theoretical out put in kilowatts
d)the mean effective pressure

Take Cp=1.006Kj/KgK, Cv=0.716Kj/KgK

These questions require answers in complete sentences. Describe at least three of the drivers and their daily, annual (and longer) and global location variability, and when, why, and how they affect ionospheric effects on RF communication. More than three drivers can compensate for any errors in the baseline three, or can provide bonus points beyond the acceptable three.

An engine operating on the outo cycle has a compression ratio of 7.5:1. At the beginning of the compression stroke,the air is at 1.035bar and 27°C. If the heat energy supplied is 930Kj/kg of air, calculate; the maximum temperature and pressure in the cycle and the cycle efficiency

The management of ‘Stakeholder’ is an integral part of the role of a project manager. Explain what a stakeholder is and why they are important to the success of a project.

Show that during the expansion of a quantity of gas according to the law PV^n = constant,the heat energy transfer Q and W are connected by the expression
Q={r - n/r - 1}W .

a quantity of a gas occupies 0.14 m cube at 9.65 bar and 371 degrees Celsius is heated during a constant volume process and the pressure reaches 41.4 bar. The gas is then expanded adiabatically to a pressure of 2.76 bar. Given that R is equal to 0.288 kilo joules per kilogram Kelvin and Gamma is equal to 1.41, calculate:
a) the temperature at the beginning of the expansion
b) the temperature at the end of the expansion
c) the heat energy supplied
d) the work energy transferred

The circuit has the following parameters R=195 ohms, C=2.5uF, L1=5mH,L2=4mH
1.find the resonant frequency fr
2. Find the magnitude (in dB) of the transfer function at the resonant frequency fr.