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A standard D cell flashlight battery is connected to a load of 3 Ω. After 6 hr of intermittent use the load voltage drops from an initial 1.5 V to a final useful voltage of 0.9 V.
(a) Calculate the internal resistance of the battery at the load voltage of 0.9 V.
(b) Calculate the average value of voltage V during the useful life of the battery.
(c) Calculate the average value of current I during the useful life of the battery.
Summarize when and why it is important to use the "50Ω"termination setting on the function generator (with thecorresponding 50Ω terminator in the circuit, of course). In which situations would this not be necessary.
Draw a block diagrams showing enamel, address, and data lines for each of the following: 2732, 2764, 27128, and 27256. Draw a schematic for a 6k x 8-bit memory array using a minimum number of 2732's.
1-If the AB current in a Y-connected load has an angle of -14°, what is the angle of the a-phase current. (0 decimals in degrees) 2-If the current of the a-phase in a Y-connected load has an angle of -73°
An induction motor has an output or shaft power of 30 kW at 86% efficiency. For this operatingcondition, stator copper loss = rotor copper loss = core loss = mechanical rotational losses. Determine the slip.
Calculate the minimum number of PN bits required for each frequency hop for an FHSS system that employs a total bandwidth of 800 MHz and an individual channel bandwidth of 200 Hz.
A new phone company wants to provide very cheap voice-only cell phone capability to 200,000 simultaneous users in San Francisco. They transmit only 8kbs per duplex channel using FDMA (frequency division multiple access) and BPSK (1 bit/Hz).
Design a common-emitter bandpass amplifier having 20dB voltage gain at frequency 1.6 MHz with a bandwidth of 80kHz, when driven by an ideal voltage source and loaded at the output by RL=100k ohm and Rs = 0 ohm.
Write a 68000 assembly language subroutine, ROTMEM, which rotates the elements (words-size) of an array stored at location point to by (A0). The depth of the array is stored as the first element.
A composite load consists of 3 loads connected in parallel.Onedraws 100W at a power factor of .92 lagging, another takes 250W ata PF of .8 lagging, and the third requires 150W at a unity PF.The parallel load is supplied by a source Vs in series wi..
An electric heater draws an average power of 1100 Watts when plugged into a 110 V-rms outlet. Calculate the resistance of the heater and the rms current.
Determine the ohmic value of the impedances.- Calculate source current in amperes and in percent if generator operating voltage is 3.8 kV and a reactance of X=125% is connected in series with the generator voltage.
Are safety hazards associated with generation, transmission, and distribution of electric power by the electric utility industry greater than or less than safety hazards associated with the transportation industry? The chemical products industry? ..
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