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Electrical Engineering
A shunt generator is converted into a compound generator by adding a series-field winding.
From the test on the generator with shunt excitation only, it is found that (a) a field current
of 8 A gives 240 V at no-load and (b) that 10 A maintains the same voltage at full-load. If the
shunt-field winding has 500 turns per pole, determine the number of series turns required.
State assumptions.
From the test on the generator with shunt excitation only, it is found that (a) a field current
of 8 A gives 240 V at no-load and (b) that 10 A maintains the same voltage at full-load. If the
shunt-field winding has 500 turns per pole, determine the number of series turns required.
State assumptions.
Electrical Engineering
A series generator is operating in the linear region where the flux is directly proportional to the armature current. The armature resistance is 80 mΩ, and the series field-winding resistance is 20 mΩ. At a speed of 1200 rpm, the terminal voltage is 75 V and the armature current is 20 A. What must be the armature current for a terminal voltage of 120 V at 1200 rpm? If it is required to have a terminal voltage of 100 V at an armature current of 25 A, what must be the armature speed?
Electrical Engineering
A Gunn oscillator creates a resonant frequency of 24.15 GHz. What is the time of flight in nanoseconds within this oscillator? (Type in a four-decimal number)
Electrical Engineering
A Gunn oscillator creates a resonant frequency of 24.15 GHz. What is the time of flight in nanoseconds within this oscillator? (Type in a four-decimal number)
Electrical Engineering
A pyroelectric sensor has the following attributes and measurements:
Sensor capacitance = 200 μF
Sensor area = 2 mm2
Pyroelectric charge coefficient = 12 Coulombs / m2 - °C
Change in temperature across sensor faces = 6.5°C
What is the pyroelectric voltage in volts across the sensor faces?
Sensor capacitance = 200 μF
Sensor area = 2 mm2
Pyroelectric charge coefficient = 12 Coulombs / m2 - °C
Change in temperature across sensor faces = 6.5°C
What is the pyroelectric voltage in volts across the sensor faces?
Electrical Engineering
A piezoresistive accelerometer has the following properties and inputs:
Axial acceleration = 75 g’s
Maximum temperature effect on sensitivity = 10%
Sensitivity = 0.4 mV/g
What is the maximum reading of the axial acceleration in mV that the accelerometer may measure?
Axial acceleration = 75 g’s
Maximum temperature effect on sensitivity = 10%
Sensitivity = 0.4 mV/g
What is the maximum reading of the axial acceleration in mV that the accelerometer may measure?
Electrical Engineering
Design a Mod 13 counter.
Electrical Engineering
Design a Mod 13 counter.
Electrical Engineering
Design an XNOR gate with two inputs A and B using only NAND gates. Mention the expressions in terms of A & B at the output of each NAND gate in your circuit diagram.
Electrical Engineering
If another stone is thrown vertically upward after 1 second at twice the initial velocity of the first, how far above the ground will the stones be at the same level?
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#339914 on Dec 2023
#339914 on Dec 2023