It is required that a loading of 3 kW be maintained in a heating element at an initial temperature of 20˚C, a voltage of 220 V is necessary for the purpose. After the element has settled down to steady state, it is found that a voltage of 240 V is necessary to maintain the 3 kW loading. The resistance temperature coefficient of the element is 0.0006 at 20˚C. Find the final temperature of the heating element.

It is required that a loading of 3 kW be maintained in a heating element at an initial temperature of 20˚C, a voltage of 220 V is necessary for the purpose. After the element has settled down to steady state, it is found that a voltage of 240 V is necessary to maintain the 3 kW loading. The resistance temperature coefficient of the element is 0.0006 at 20˚C. Find the final temperature of the heating element.

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter19: Special-purpose Outlets-water Pump, Water Heater

Section19.2: Water Heater Branch Circuit

Problem 8R: For residential water heaters, the Consumer Product Safety Commission suggests a maximum temperature...

See similar textbooks

Similar questions

Consider the circuit shown in figure 2-8. the circuit operates at 60 hz, the rms of the voltage is 120 volts, the resistor has a value of 40 ohm, the inductor is 0.1592 H, and the capacitance is 33.16 UF. a) Find the impedance of the inductor and the capacitor. b) Find the current in each leg of the circuit and the total current from the source. c) Draw a phasor diagram showing the source voltage and all the currents. d) Find the total impedance of the RLC parallel combination
A coil has a resistance of 18 when it mean temp is from 20o C to 50o C. Find its mean temp rise when its resistance is 21 and the surrounding temp is 15o C. A potential difference of 250 V is applied to a copper field coil at a temp of 15o C and the current is 5A. What will be the mean temp of the coil when the current has fallen to 3.91 A, the applied voltage being the same as before.
A five-Ohm resistor is in series with a 0.001-Henry inductor and is supplied from a 10-V DC source. Solve for the current 2 milliseconds after the switch was turned on. a. 2.0000 Amperes b.1.9999 Amperes c.1.0001 Amperes d. 2.0001 Amperes
How temperature effect conductivity? Explain with the help of following equation. m e'n7'
For the network shown in figure (3), if the switch is closed for 2usec and then opened for Susec, find mathematical expressions for vi and in of both periods of time and then plot the waveforms of vL and i as a function of time.
lell L1 R Ro 2. In this figure, assume arbitrary numbers for R1, R2, L1, and L2 including some number for the battery E. Find the rate of current in which inductor one (L1) is changing just after the switch is closed. Next, find the current in L1 after some time after the switch has been closed. lell
8. Liquids with solid impurities a) Have higher dielectrie strength b) Of large size have higher dielectric strength c) Have lower dielectric strength as compared to pure liquids d) None of the above 9. Peak to peak ripple is defined as a) the difference between average de voltage and peak value b) the difference between maximum and minimum de voltage c) the difference between maximum ac and average dc voltages d) the difference between ac (rms) and average de voltages 10. In a Cockroft-Walton circuit, input voltage 100 kV load current 25 mA, supply frequency 100 Hz, each capacitor 10 nF. The optimum no. of stages for maximum output voltage is a) 1 b) 2 c) 10 d) 35
Steady current circulation is desired for a lamp connected in a circuit to light. For this, explain how a stable current will occur from any part of the circuit with the conservation law of the charge. Give me detail pls.
Write the solution
Which of the following statement is true? a. Angle between load voltage and load current in a pure capacitive load is 45 degree. b. Angle between load voltage and load current in a pure capacitive load is is 180 degree. c. Angle between load voltage and load current in a pure capacitive load is is zero. d. Angle between load voltage and load current in a pure capacitive load is is 90 degree.
Aluminum has a resistivity of 10.6×108 Nm at 20°C. What will the resistivity of Aluminum when then temperature is increased to 1000°C. (Take a as 2.65×10-³)
The 3-phase half-wave rectifier given in the figure is connected to 3-phase 380 380 V 50 Hz network and feeds 20 Ω ohmic load. Plot the average value of the current flowing through the load and the waveform (vdc) of the voltage across the load on the dashed curves given.