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A certain power supply provides a continuous 2 W to a load. It is operating at 60% efficiency. In a 24 h period, how many kilowatt-hours does the power supply use?
(i) an antenna connector and feedline with an attenuation of 1.5dB; a low-noise amplifier with a noise figure of 4 dB and a gain of 10 dB, and a unit gain mixer with a noise figure of 1 dB. What is the noise figure of the receiver
The penny is given acharge of +5nC, and the nickel and dime are discharged. Theassembly is lowered into the can so that the coins hang clear ofall walls, and the lid is secured. The outside of the can is againtouched momentarily to ground.
A shunt dc motor has RA = 0.1-ohm and VT = 440 V. For an output power of 16.1 hp, nm = 1,213 rpm and IA = 103 A. The field current remains constant. Find the the rotational power loss in hp.
Adding dopants to a sample of silicon is found to reduce the Hall coefficient by a factor of 10 and increase the conductivity by a factor of 5. What effect has this dopant addition had on the mean free path
1.) Differentiate EN with respect to r, and then set the resulting expression equal to zero, because the curve of EN versus r is a minimum at E0. 2.) Solve for r in terms of A, B, and n, which yields r0, the equilibrium interionic spacing.
A charge q is placed between two grounded infinite parallel conducting planes which are a distance "d" apart (see figure attached). Let ε_r = 1.
A 1000 kg battery powered adiabatic electric vehicle has a fully charged battery containing 20.0 MJ of stored energy. If it requires 12.0 kW of power to keep it moving at a constant velocity on a horizontal road
b. Find the Fourier Transform of signal x(t) (use the Fourier Transform definition) c. Write down the double-sided amplitude and phase spectra x(t) d. Plot the double-sided amplitude and phase spectra of x(t)
A lighting load operates from a 208-V 60-Hz supply and is rated 1.0 kW with a power factor of 0.9 lagging. A 40-µF capacitor is connected in parallel with this load. Calculate the total power factor and the percent change in line current.
A)Calculate the following values through analysis: Vb, Ve, Vc, Ie B) Based on the value of Ie, calculate the value of re for the BJT.
A milliammeter is connected between points A and B in Figure 15. It measures 50 mA. If you move the meter and connect it between points C and D, how much current will it indicate? Between E and F?
An Al0.3Ga0.7As p-n junction LED with doping level ND = 1 x 10^18 cm-3 on n-side and NA=1x10^15 cm-3 on p-side has Vf = 0.9 V forward bias across its junction. The LED cross-section is 200 µm x 200 µm.
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