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An amplitude modulated amplifier has a radio frequency output of 50w at 100% modulation. The internal loss in the modulator is low. What output power is required from the modulator?
A 9 GHz parallel polarized wave with an amplitude of 20 V/m is obliquely incident from air (z 0). Theta_i equals a 60-degree angle of incidence.
A 52-kg pole vaulter running at 12 m/s vaults over the bar. Her speed when she is above the bar is 0.7 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar.
A 3-phase 230 V, 9 kVA, 0.9 PF (lagging) load is supplied by 10 kVA, 1330/230 V, 60 Hz three-phase transformer connected in Y-?. The equivalent impedance of transformer referred to the low-voltage side is 0.12 + j0.25.
What is the system reliability for a light panel containing 12 light bulbs, and only requires 9 bulbs to be working for success (only 3 failures allowed). The reliability performance of the bulbs is based on the exponential reliability distributio..
for the circuit where Vr=30 Ohms, L=20 mH, C=39uF, and e=squareroot of 2(20)sin(1000t+40 degrees) a. Determine I, Vr, and Vc in phasor form b. Calculate the total power factor and indicate whether it is leading or lagging
A 1.80kg , horizontal, uniform tray is attached to a vertical ideal spring of force constant 195N/m and a 290g metal ball is in the tray. The spring is below the tray, so it can oscillate up-and-down.
Given: Si is doped with boron atoms; concentration of boron atoms is 1014 cm-3. Find: carrier concentration in Si at T = 300 K. (Hint: use Principle of Space Charge Neutrality) Find: Ei - position of Fermi level in intrinsic Si at T..
A rectangular pulse v(t) has a magnitude of 1.0 volts and duration 5 μs. The pulse is multiplied by a sine wave x(t) at a frequency of 2.0 MHz. a. Write down an expression for the spectrum of the signal y(t) = x(t) x v(t).
For each of the sinusoidal source functions, determine the complex exponential source that has the given source as its imaginary part. Determine the phasor representation of each of the sinusoidal source functions.
Compute the correlation coefficient of two channels with frequency separation of 100 kHz and temporal separation 5 ms. Assume that the maximum Doppler shift of the channels is f_d=kv=100Hz and the rms delay spread is S_tao=1 µs.
design a regulated poewr supply with these specs Output a dc voltage of 10 V Load Variation: 0.3 -10000ohms Ripple Factor: less 0.1% for 2000ohms load
A barometric pressure transducer is measuring pressure between 800 and 1100 mbars. If the transducer output is scaled to 0-5V and input to the HCS12 ATD confugured in 8-bit mode, what is the pressure measured when the ATD output = 0x5A
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