Electrical Engineering Answers

A Country’s Government has approved a relocation plan for a section of its population to inhabit a 3-island portion. Design a hypothetical Telecommunication network(Fixed and mobility consideration) for both internal and external communication.

Consider the following

Islands location is 5000km from the main land 

Islands are equidistant from one another

Accessibility by water transport

Government very resourceful – enough money

A lot of economic activity on the Islands (billions of dollars annually)

1.5 million population with 80% adults

120-kilometre bridge links the three islands

1．Radio Frequency circuit is mainly used for? （ ）. 

A． Processing audio signals 

B． Wireless communication 

C． Generate sine waves 

D． Supply power 

a shunt motor is running off a 220 - V supply taking an armature current of 15A , the resistance of the armature circuit being 0.8ohms . calculate the value of the generated e.m.f . jf the flux were suddenly reduced by 10 percent , to what value would the armature current increase momentarily ?

A shunt machine is running as a motor off a 500 - V system , taking an armature current of 50 A. if the field current is suddenly increased so as to increase the flux by 20 per cent , calculate the value of the current that would momentarily be fed back into the mains . neglect the shunt current and assume the resistance of the armature circuit to be 0.5 ohms.

. A Country’s Government has approved a relocation plan for a section of its population to inhabit a 3-island portion. Design a hypothetical Telecommunication network(Fixed and mobility consideration) for both internal and external communication.

Consider the following

1.    Islands location is 5000km from the main land

2.    Islands are equidistant from one another

3.    Accessibility by water transport

4.    Government very resourceful – enough money

5.    A lot of economic activity on the Islands (billions of dollars annually)

6.    1.5 million population with 80% adults

7.    120-kilometre bridge links the three islands

an ideal gas at 50 psig and 110 f is heated in a closed cylindrical vessel. what is temperature fi the pressure gauge reading is 100 psig

 Express the following numbers in what seems to you the most logical form for future calculations:

a. 15,000 b. 0.03000

c. 7,400,000 d. 0.0000068

e. 0.00040200 f. 0.0000000002

The load connected between each line and the neutral of a 415 volts, 50hertz 3 phase Circuit consist of a capacitor of 31.8 micro ferad in series with a resistor of 100 ohms. CALCULATE the line current and the Total Power.

3 equal coils of inductive reactance 30 ohms and resistance 40 ohms are connected in Star to a 3 phase supply of line voltage 400 volts. CALCULATE the line Current and the Total Power

An impedance coil having a resistance of 15 ohms and an inductance of 0.08 henry is connected in series with a variable capacitor. If a 117 volt 60 cps source is connected to the circuit, what will be the capacitance of the capacitor and the current

(a) when the circuit has a power factor of 0.866 leading and (b) when the voltage drop across the coil is equal to the voltage drop across the capacitor?