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A half wave dipole antenna is operating in air at a frequency of 100 MHz. At a distance of 1000 km and at an observation point ? = ?/2, electric field strength is measured to be 5 µV/m. Calculate the :
a. Length of the antenna
b. Current fed to the antenna for the measured Electric field.
c. Power radiated by the antenna.
d. If a transmission line with Zo = 75 ? is connected to the antenna, determine the standing wave ratio.
A conducting sphere in free space has a radius of a= 10cm. the capacitance of the isolated sphere is C= 4oa. now let's coat the sphere with a dielectric with fr= 3, and the thickness of the dielectric layer is d.
A 415V to 11 kV transformer has a rating of 200 kVA. The winding resistance and leakage reactance when referred to the primary are 0.014 and 0.057 ohms respectively.
What does the DAQ Assistant do How is it useful over the legacy acquisition methods What does FFT stand for and what does it do to a real-time signal Sketch the output of an FFT analysis performed on a 100 Hz sinewave signal at 1 V.
Write a short essay on your genre (ACTION) and its importance to the film canon. Use specific examples of films that illustrate its importance (you don't need to limit yourself to films you watched for this class).
Voltage, current, power, and stored energy of capacitor, Prior to t=0, a 100- uF capacitance is uncharged. Starting at t=0, the voltage across the capacitor is increased linearly with time to 100V
Explain briefly from what you notice about the digital output values in (a) why a digital output value of an A/D converter is rarely the exact same digital value as the analogue input value.
Isc of 3.3A under input power Pinput=1kW/m^2. Assuming diffusion dominated behavior and no parasitic resistance elements, what is the device conversion efficiency at the maximum power point
A series-connected circuit has a 240-V voltage source, a 10- resistance, a 5- resistance, and an unknown resistance Rx. The voltage across the 5-? resistance is 30 V. Determine the value of the unknown resistance.
A mass "m = 2 kg" is connected to a spring with spring constant "k= 5 N/m " on a frictionless table oscillation only in 1-D (x direction) . The equation of motion for the mass is given by the equation m (d^2 x(t)/ dt^2) = -kx(t) .
Determine the standing wave pattern for the voltage in the line. Express the result in real insantaneous form and simplify
What is the advantage of using a double-break contact instead of a single-break contact?
an inductive circuit takes a current of 10.5 amperes when connected to a 500 volts 50c/s supply. this current rises to 12.5 amperes when frequency is reduced to 40 c/s. the voltage being maintained constant. find the resistance and inductance of t..
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