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If 2*10^15 gold atoms per cm^3 are added to intrinsic silicon as a substitutional impurity and are distributed uniformly throughout the semiconductor, determine the distance between gold atoms in te
The rotor of a 4 pole generator is wound with a 100 turn coil. If the flux per pole is 4.5mWb and the rotor turns at a speed of 1800 rpm, determine (a) The frequency of the induced voltage in the ro
A certain parallel resistor circuit consists of only ½ W resistors. The total resistance is 1.0 k-ohm, and the total current is 50 mA. If each resistor is operating at one-half its maximum pow
If the self-imaging planes are 1 cm apart, what is the transverse periodicity of the object. Assume the wavelength of illumination as 1 micron. find the locations of the planes where one can observe
a) Three delta-connected absorb 60 KW when connected to a 3 phase line. IF they are reconnected in wye, calculate the new power absorbed. b) Three 10uF capacitors are connected in wye across a 2300v,
Consider a 16-ary PSK system with symbol error probability PE=10-5. A Gray code is used for the symbol to big assignment. What is the approximate bit error probability. Repeat for a 16-ary orthogona
A 2000 kVA, 4800-600V, 60 Hz, core type transformer operating at no load in the step down mode draws a magnetizing current equal to 2 percent rated current. The core has a mean length of 3.15meters,
Design a diode voltage regulator to supply 1.5V to a 150-ohm load. Use two diodes specified to have a 0.7-V drop at a current of 10mA. The diodes are to be connected to a +5-V supply through a resis
A 2400-115 V transformer has a sinusoidal flux expressed by φ =0.113 sin 188.5t. Determine the primary and secondary turns.
when operating in the step down mode and feeding a load impedance of 8<32degrees Ω. Sketch the circuit and determine (a) a low side voltage; (b)high side voltage; (c) high side current; (d)
Determine (a)secondary voltage; (b)secondary current; (c)primary current; (d)input impedance at primary terminals of transformer; (e)active, reactive, and apparent power input to transformer.
Sketch the equivalent circuit and phasor diagram for the no-load conditions and, assuming operation is in the step down mode, determine (a)the exciting current; (b)the core loss component of the exc
If the resultant core flux is 0.0683 Wb (max), determine (a) the number of turns of wire in the secondary coil; (b) the new core flux if the driving voltage is increased by 20 percent and the freque
Given a battery rated at 10 amp-hours, how long could my differential amplifier (containing a circuit of three (3) 741 op amps) be powered by the battery, before the battery would fully discharge.
From a point source inside the ocean we generate a sound wave. This wave propagates isotropically (the same in all direction, spherical wave) with frequency of f= Hz. The amplitude of the wave at m
A 15kV:175kV, 125 MVA, 60 Hz single-phase transformer has primary and secondary impedances of 0.0095+j0.063 per unit each. The magnetizing impedances is j148 per unit. All quantities are in per unit
When the variable resistor is adjusted to one extreme position the overall circuit voltage gain should be 3. When the variable resistor is adjusted to its other extreme position the overall circuit
The current entering the positive terminal of a device is 5e-4t A and the voltage across the device is 2 di/dt V. Find the charge delivered to the device between t = 0 and t = 2 s.
Let D = 4xy ax +(2x2+2z2) ay + 4yz az nC/m2 and evaluate surface integrals to find the total charge enclosed in the rectangular parallel piped 0 < x < 2, 0 < y < 3, 0 < z < 5 m.
Suppose a fair coin is tossed n times. Each coin toss costs 'd' dollars and the reward in obtaining 'X' heads is aX^2 + bX. Find the expected value of the net reward.
The exciting current for a certain 50 kVA, 480-240V, 60 Hz transformer is 2.5 percent of rated current at a phase angle of 79.8 degrees. Sketch the equivelent circuit and phasor diagram for the no-l
A 22000 V, 60 Hz generator is connected to the high voltage side of a 22000-2200V, 500 kVA step down transformer. If the resultant core flux is 0.0683 Wb (max), determine: A) the number of turns of
A 100 kVA, 60 Hz, 7200-480V, single-phase transformer has the following parameters. Determine the equivelent impedance of the transformer A) referred to the high side B) referred to the low side
A 2000 KVA, 4800-600V, 60 Hz, core type transformer operating at no load in the step down mode draws a magnetizing current equal to 2 percent rated current. The core has a mean length of 3.15 m, and
A 2400-115V transformer has a sinusodial flux expressed by φ=0.113 sin 188.5t. determine the primary and secondary turns.