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A room is heated by a baseboard resistance heater. When the heat losses from the room on a winter day amount to 6500 kJ/h, the air temperature in the room remains constant even though the heater operates continuously. Determine the power rating of the heater, in kW.
An induction motor takes 350kW at 0.8 power factor lagging while driving a load. When an overexcited synchronous motor taking 150kW is connected in parallel with the induction motor, the overall power factor is improved to 0.95 lagging.
The LM358 op amp can be a single or dual supply op-amp. This mean that it can operate with just a single supply i.e. + 5 volt or with dual supplies i.e. (+ and -) 5 volt supplies. With a inverting configuration with dual supplies (+5v and -5v) bei..
(1) In a lab experiment on parallel Resonance circuit with switch closed, What is the phase relationship between Ic and IL at Is minimum (2) Why is the source current , Is, minimum at a given frequency
Consider a PCM-TDM system in which 24 signals are to be processed. Each signal has a baseband bandwidth of 3 KHz. The sampling rate has to be 33.3% higher than the theoretical minimum, and 8 bits are to be used.
A load is consisting of induction motors is drawing 80 kW from a 220-V, 60-Hz power line at a power factor of 0.72 lagging. Find the capacitance of a capacitor required to raise the pf to 0.92.
In step four of this problem, how do you know in which direction to simplify the resistance for the thevenin resistance. (since you come up with a different answer depending on which direction you choose to simplify from)
Series Connection of Batteries with Automatic UPS System.
There is a circuit with a 12V DC battery,500mH inductor, a 45 ohm resistor, and a switch all inseries. Suppose the switch has been closed for a very longtime when a wire is connected over just the battery.
A permanent magnet motor is driving a load that requires 0.08Nm.The motor data is:RA =2W, VA =12v,Kt =0:05Nm/A ,KG = 0:004 V/RPM . Find themotors running speed and the power output.
Can we build a bandpass filter using a low pass and a high pass filter combination. If your answer is yes, then how should the cut off frequencies be arranged. Illustrate your answer with a simple example.
A power supply, when connected to a radio, provides 5V to the radio. When connected to a lamp, it provides 4V to the lamp. Assume the radio can be modeled as 6ohm resistor and the lamp can be modeled as a 0.7ohm resistor.
Determine the current in a circuit consisting of a 1000-ohm resistor with a voltage of 50 volts DC across it. When using an ammeter, why do you place it in parallel with the circuit
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