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A central air conditioner in a typical American home operates on a 220-V circuit and draws about 15 A of current.a. Determine the power rating of such an air conditioner. b. Determine the energy consu
A stun gun or TASER is designed to put out a few seconds worth of electric pulses that impress a voltage of about 1200 V across the human body. This results in an average current of approximately 3
A 4.5-volt series circuit consists of two resistors. Resistor A has three times the resistance as resistor B. An ammeter records a current of 160 mA of current. Determine the resistance values of re
Having recently lost her job, Penny Penching is looking for every possible means of cutting costs. She decides that her 4.0-Watt clock radio alarm does not need to be on for 24 hours every day since
Suppose an 802.11b station is configured to always reserve the channel with RTS/CTS sequence. Suppose this station suddenly wants to transmit 1,000 bytes of data, and all other stations are idle at
design a system comprising a pulley actuated by a stepper motor to lift objects of maximum mass of 1kg. No gear box is required. A 48 VDC power source is available. Select a pulley (specify the diam
The turning moment diagram for a multicylinder engine has been drawn to a scale 1 mm = 600 N-m vertically and 1 mm = 3° horizontally. The intercepted areas between the output torque curve and th
Alfredo deDarke sleeps with a 7.5-Watt night light bulb on. He turns it on before getting in bed and turns it off 8 hours later. a. Determine the amount of energy used during one evening in units of k
The mass of flywheel of an engine is 6.5 tonnes and the radius of gyration is 1.8 metres. It is found from the turning moment diagram that the fluctuation of energy is 56 kN-m. If the mean speed of
As current passes through the wires, the wires heat up, thus toasting the toast. Estimate the overall resistance of a heating element which is 220 cm long and consists of nichrome wire with a diamet
Determine the amount of time that the following devices would have to be used before 1.0x106 C (1 million Coulombs) of charge passes through them. a. LED night light (I=0.0042 A) b. Incandescent nig
A decade counter uses Gray code. The counter has 4 FFs with outputs labeled A,B,C,D. Derive the simplest SOP excitation equation for the counter if it uses D FFs, then repeat for JK FFs.
When finding the inverse Z-transform of functions with z-1 terms in the numerator, the fact that z-1 can be thought of as a delay operator can be used to simplify the computation. Consider X(z) =1 -
Consider the mapping of the unit circle (i.e., z = 1ejω, -π ≤ ω < π). Obtain the segment in the s-plane resulting from the mapping. Consider the mapping of the inside and the
Given: A permanent magnet DC motor with kv = 0.7 v-s is tested under the following two conditions: Test 1: Apply 120 V; motor unloaded, Ia=2A and w=160 rad/s Test 2: Apply 120 V, increase load torque
Given: A permanent magnet DC motor has a machine constant, Kv = 0.5 V-s. The no-load torque is 1.0 Nm. Assume mechanical torque loss is a constant. Determine the mechanical power developed by the un
Calculate the electric field strength E1 (Newton/Coulomb) at the surface of an ellipsoid with major/minor axes of 0.3m x 0.4m x 0.4m, enclosing a charge q2 at the origin with 26.5 Coulomb. The mediu
design a decimal adder for digits represented in the excess-3 code. Show that the correction after adding two digits with a 4-bit binary adder is as follows (a) The output carry is equal to the carry
Obtain the discrete-time (DT) or sampled signals x[n] = x(nTs) and h[n] = h(nTs) by discretizing the CT signals x(t) and h(t), respectively, using a sampling period of Ts = 0.01 s. This value ensure
a toroidal maganitic core is wrapped with a coil of wire containing 200 turns. the cross sectional area of the core is 10 cmsq,and the mean length around the core is 20 cm. the material permability
a change in the coil over a period of 4mSec causes total flux in the core to decrease at a constant rate by a total of 0.10 mWb. What voltage is induced in the 1000 turn coil by the change in flux.
A three-phase 765-KV, 60-Hz,300-km,completely transposed line has the following positive-sequence impedance and admittance: z=0.0165+j0.3306 Ω/hm y=j4.674x10-6 S/km ten to the minor
A current i(t) = 10r(t) mA is applied to a 10 mF capacitor for t > 0, where r(t) is the ramp function. At t= 0, the capacitor voltage was zero. The voltage across the capacitor at t = 2 s is
design the logic circuit for starting an emergency diesel generator. For the generator to start, the generator must be disconnected from the bus, there must be sufficient starting air pressure, and
Find the capacity of the cascade connection of n binary-symmetric channels with same crossover probability ε. what is the capacity when the number of channels n=2.