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An antenna having an input impedance on transmission of 70+j30 ohms is used on reception by connecting directly to a 50 ohms transmission line which is perfectly matched to a pure resistance load. The effective area is 0.40 m^2. Find the power transfer to the load if the antenna is in a plane wave field of 100 u V/m. Compare this with power that could be obtained with a conjugate match to the antenna impedance?
a) Evaluate % overshoot, settling time and peak time if a=4 and b=25 b) Calculate values of a&b so imaginary part of poles remains same but real part increased by 2 times
define state variables, determine the required initial conditions, and use Matlab to solve for voltages Vc(t) and Vo(t). Plot the results, and verify that the numerical solution using state variables matches the hand calculation solution.
Suppose a resistor whose value is equal to the motor resistance is connected across the motor terminals and the motor is spun at 200 RPMs. What will be the voltage measured across the motor terminals
A hypothetical starting motor in an automobile has an armature 20 cm long, diameter 10 cm and has slots 0.5 cm deep filled with windings. The radial field is provided by coils in the stator to obtain a flux denisty of 0.2 Wb/m^2
The goal is to design a memory system to support a small amount of data storage outside of the processor. The design is to be based on the 16K bit CY7C128A SRAM organized as 2Kx8. (a) Provide a high-level block diagram for such an interface.
A signal source produces a 4 volt peak-to-peak sinusoid and has a source resistance of 100 ohms. We wish to drive a grounded 10 ohm load to at least 2 volts peak-to-peak with this source. The load cannot tolerate DC. Your amplifier should not burn..
A photoresistor is connected series to a battery of 10 V with internal resistance of 5 Ohms. The ohmic resistance of the photoresistor changes by time through the day and expressed as: RLDR=20-(10/t) .
How to calculate the transient time need for the simple passive low pass filter Why it needs the time more then 5-Tau (RC) to become a steady state
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
a positive charge of magnitude q1 lies at the origin. derive an expression for the incremental work done in moving a
A GaAs device is doped with a donor concentration of 3e^15/cm^3 . For the device to operate properly, the intrinsic carrier concentration must remain less than 5% of the total electron concentration
Four l-byte numbers are stored in memory from addresses 0x0200 to0x0203. Write an AVR assembly program that counts the number of bits that are 0 ineach of these four bytes and stores the counts for each byte in memory from addresses0x300 to 0x..
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