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design a DSB-SC modulator to generate a modulated signal km(t)cosωct with the carrier frequency fc = 500kHz (ωc = 2π x 500,000). The following equipment is available in the stockroom: (i) a signal generator of frequency 100 kHz; (ii) a ring modulator; (iii) a bandpass filter tuned to 500 kHz.(a) Show how you can generate the desired signal.(b) If the output of the modulator is k x m(t)cosωct, find k.
A truncated cone has a height of 50cm. The circular faces on the top and bottom have radii of 20 mm and 1mm, respectively. If the material from which the solid cone is constructed has a conductivity sigma of 2 x 10^6 S/m.
The current in the bulb depends on the time t according to the relation I = (0.807 A) sin [(272 rad/s)t]. (a) What is the frequency of the alternating current (b) Determine the resistance of the bulb's filament. (c) What is the average power deliv..
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.
when the line was open-circuited, the measurement yielded an input impedance equivalent to a capacitor with capacitance of 40 pF. Find Zo of line, the phase velocity, and the relative permittivity of the insulating material.
An Aluminum electrolytic capacitor that has a capacitance of 75,000µ F,100WV is used in a power supply circuit. The leakage specification of this type of capacitors is 5µ A/µ F. If the voltage across this capacitor is 50 volts, what will be the le..
Consequently, this form of serial data communication is known as asynchronous. Compare and contrast this against synchronous serial data communication, giving an example of a synchronous data communications standard.
A charged particle (charge q, mass m) is moving under the influence of a magnetic field B = B0 az. If the velocity vector of the particle is v = v a ax +- vy ay + vx az Show that the acceleration of this particle lies in the x-y plane.
An inductor and a capacitor are connected in series and connected to a variable frequency voltage source (e.g., a function generator). Explain what happens to the total circuit impedance and current as the source frequency is varied.
a beam of polarized light of intesity I0 passes through a sheet of ideal polarizing material. The polarization axis of the beam and the transmission axis of the sheet differ by 30 degrees. What is the intensity of emerging light
Three resistors R1, R2 and R3 are connected in series and a supply voltage of 240 V. If R2 = 2R1, R3 = 3R1 and the total power taken by the circuit is 480 watts. Calculate the power in each resistor.
State Carson's rule for bandwidth estimation. What does it reduce to for NBFM and WBFM and d erive an time domain expressionfor the output xd(t) of the system
Immediately after the explosion, the velocity of the 1200 kg upper stage is 5700 m/s in the same direction as before. What is the velocity (magnitude and direction) of the 2400 kg lower stage after the explosion
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