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A 120 V lamp-dimming circuit is controlled by a rheostat and protect from excessive current by a 2 A fuse. To what minimum resistance value can the rheostat be set without blowing the fuse? Assume a lamp resistance of 15-ohm.
Calculate the L and C values of an L network that is to match a 9 ohm transistor power amplifier to a 75 ohm antenna at 122 MHZ.
You are evaluating the feasibility of adding an injection molder to fabricate plastic sporks (everybody’s favorite harmless utensil) for the US Facility for the Criminally Insane. An injection molder will cost $1,200,000 installed.
Design an interface for a 12 V, 500 mA bipolar stepper motor. There are 200 steps per revolution. Write software to spin the motor at 1 rps.
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 unloaded motor at 1250 rpm.
Describe whether Google is exploitive, impoverished, supportive, or enlightened. Describe the features google that indicate which kind of organization it is. Describe five steps google could take to become better and move up in the scale.
In a typical commercial electrical distribution system, which is more common: an inductive power factor, or a capacitive power factor. What is the most common technique used to correct this kind of low power factor.
An uncharged capacitor and resistor are connected in series with a 12V source and switch. What is the voltage across the capacitor after the switch is closed and the capacitor is fully charged
First draw the transmit con-stellation and the receive constellation with ideal phase tracking and sampling. Note:they are obviously the same constellations. Now, assume that receiver synchronization is off by a phase angle.
What annual revenue is required to cover fixed costs? What will be the annual variable costs? How much will electricity cost per kWh?
Transmitting data at higher speeds generally requires a wider bandwidth, which is not always possible within FCC guidelines. In addition to the wider bandwidth, higher speed transmission also requires a higher transmit power. Why
The initial voltage across the capacitor, defined using the passive sign convention in terms of the current i , is 4.5 V. (a) Write the time domain integral equation that arises from application of KVL. (b) By first solving for I(s), determine the..
How do you create a C-style string. Give examples. How do you input or output a C-style string. What kinds of tools are available to work with C-style strings. Show some examples of using those tools.
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