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A medium wave antenna mast is 50 m high and is operating at 1 MHz with a top loading the effective height is equal to 45 meters :
i- find the radiation resistance .ii- with input power = 100 Kw , find the input current given that the ground resistance = 2.5 ohm .iii- find the radiated E field at 30 Km from the antenna .
one question: During each cycle, the velocity v (in mm/s) of a piston is v = 6t - 6t^2, where t is the time (in sec). Find the displacement s of the piston after 0.75 sec if the initial displacement is zero.
A single-phase half-wave rectifier is fed with a triangular signal with period 2 . The maximum positive and negative amplitudes are ± 12 V rms. determine: a) The value of the DC output voltage. b) The percentage of curly
Examining frequency to time domain signals, A spectrum analyzer is connected to an unknown signal. The spectrum analyzer displays the power level of signals in dBm vertically and frequency horizontally. The spectrum of the unknown signal creates t..
y(t) + 0.2(dy(t)/dt) = x(t) a. Find y(t) if x(t) = 6(e^-2t)u(t) and y(0) = 3. b. In a. identify the zero-input and the zero initial condition part. c. In a, identify the systems-type and the input-type part.
The carrier wave of frequency 100 MHz is frequency modulated by a sinusoidal wave of amplitude 20 V and frequency 100 kHz. The frequency sensitivity kf = 25 kHz/V. 1. Write expression for FM modulated wave s(t) if Ac = 1 V.
Using the Nth order term only of the transfer polynomial, find the Nth order relationship for the Nth order products.
A 3-Phase stepping motor is to be used to drive a linear axis for a robot. The motor output shaft will be connected to a screw thread with a screw pitch of 5 mm. We want to be able to have a spatial control of at least 0.1 mm.
given a triangular plane in the coordinate plane slanted with a surface bounded by the closed path. how to find the magnetic flux in that plane
The rotor of a 3phase, 5kw, 400v, 50Hz, slip ring indution motor is wound for 6 poles while its stator is wound for 4 poles. The approx average no load steady state speed when this motor is connected to 400v, 50Hz what is the supply
Describe the circuit's response to a 4 Vpp sinusoid. Measure its time constant and describe the circuit's response to a 100 Hz, 10 Vpp square wave centred on 0 V.
Analyzing the Blink Alive code - Embedded Systems Design
The pumps exhibit a surging effect with a period of 2.2 sec. What is the minimum sampling rate to ensure quality data. How much time can be spent processing each station's data. Data acquisition hardware and software take 200µ sec for a channel.
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