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Application: Maximum charge and maximum potential on a sphere. A sphere of radius a is charged with a surface charge density Pr. If the electric field intensity in air cannot exceed 3000 V/mm:
(a) What is the maximum charge density the sphere can accumulate?
(b) What is the maximum potential the sphere can be connected to without causing breakdown?
The equal area criteria to determine if a synchronous machine will remain "stable" after a disturbance is essentially an application of the principle of conservation of energy. Very briefly describe how this process can be used to describe the res..
A 12 V battery with a 0.3 internal resistance is to be charged froma 15 V source. If the charging current should not exceed 2 A, what is the minimum resistance of a series resistor that will limit thecurrent to this safe value
Imagine you have an experimental system consisting of a hot brick and cool pail of water. You combine these by tossing the brick into the water. Assume that the resulting process does not change the volume of either the brick or the water. Also yo..
A selective-repeat (SR) data link layer protocol uses 4 sequence bits to number it's frames. The source, C starts from frame 0 and proceeds following the Sr protocol. Let us start analyzing the frame/ACK transmissions when the first outstanding fr..
A cable TV receiver has an input impedance of 200?. The cable TV distribution system uses RG-6 cable. This cable has a characteristic impedance of 75?. Design an impedance matching stage to maximize the power transfer from the wire to the receiver..
Derive Eigenvalue equation for the Transverse magnetic modes in a symmetric waveguide.
A 220V, three phase, Y connected, synchronous motor has a synchronous impedance of 0.25 + j25 ohm/phase. The motor delivers the rated load of 80A at 0.707 pf leading. Determine a.) the excitation voltage, b.) the power angle, and c.) the power develo..
Calculate the natural frequency requirements, if the damping ratios are 0.3 and 0.6 respectively. Determine the phase shift in each case at 50 and 75Hz
A single phase two winding transformer having rating: 20 KVA,480/120 V, 60 Hz A source connected to the 480 V winding supplies an impedance load connected to 120 V winding. The load absorbs 15 KVA at 0.8 pf lagging when load voltage is118 V.
Find the inverse laplace tansform F(s) =(2s+5)/(s^2+5s+6)F(s) = (2s+5)e^-2s/(s^2+5s+6)
an electrical machine whose power consumption is 2.0kw requires the use of a 250meter extension cord. determine the
calculate the required thickness in x-direction of a silicon wafer in nm to create an 0.2 ev energy difference
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