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1. If a lamp is measured to have a resistance of 45 ohm when it operates at a power of 80 W, what is the current in the lamp?
A. 2.10 A
B. 1.3 A
C. 0.91 A
D. 0.83 A
2. If a lamp has a resistance of 120 ohm when it operates at a power of 1.00 x 10^2 W, what is the potential difference across the lamp?
a. 110 V
b. 120 V
c. 130 V
d. 220 V
3. An electric toaster requires 1100 W at 110 V. What is the resistance of the heating coil?
a. 7.5 ohm
b. 9.0 ohm
c. 1.0 x 10^1 ohm
d. 11 ohm
Design an RC low-pass filter with a cutoff frequency at 2kHz, using a capacitor of \(0.1\mu F\) A. Show a circuit diagram and your calculations in obtaining R B. Make as sketch of the absolute value of the input impedence
commercialization and sales potential do what you can in this section more information here may save time in
Consider a network with a driving-impedance Z. (1) Find expression for P and Q. (2) Find p(t) in terms of P and Q. (3) Suppose that the network is a series RLC. Interpret the result in part (2).
The shaft output of a three-phase, 60 Hz induction motor is 100 HP. The friction and windage losses are 900 W, the stator core loss is 4200 W, and the stator copper loss is 2700 W. If the slip is 3.75%, what is the effïciency of the motor
Considure a circular disk in the x-y plane of radius 5.0 cm.Suppose the charge density is a function of radius such thatρs = 12ρ nC/cm2 (when ρis in centimeters). Find the electric field intensity a point 20.0cm above the origin on the z-axis.
Expand the memory unit to a 32x4 RAM using two 7489ICs ( you might use the HM6116A120 chip for the Multisim Program Simualtion). Use the CS inputs to select between the two ICs. Note that since the data outputs are 3-stated
Calculate the average power of this periodic signal. Find thediscrete Fourier series for x[n]. Calculate the average power from the cofficients ak A periodic signal x[n] has period N = 2. One period of x[n]
A small circular parabolic reflector, often referred to as dish, is now being advertised as a TV antenna for direct broadcast. Assuming the diameter of the antenna is 1 meter, the frequency of operation is 3 GHz, and its aperture efficiency is 68%
A motor operated from a 480 V(rms), 60 Hz source has an output of 800 hp. The motor is 89% efficient and has a power factor of 69.5% lagging. What is the electrical input power in watts of the motor
suppose that atransmitter sends power into a transmit antenna whose gain is +4bBi. The receiver some distance away receives a powe of -50dBm when operating with a receive antenna whose gain is -3dBi.
Assume a buck converter contains a synchronous rectifier. Does it operate in the discontinous conduction mode at light load Why What does the inductor current waveform look like
An n-type piece of silicon with a length of .21um and a cross section area of .05x.05 um sustains a voltage difference of 1V. If the doping level is 10^17 cm^-3, Calculate total current flowing through the device at 300K
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