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We have to work this problem on a DC basis, since we know nothing about the power factor
of the supply, or the reactance of the heater.
Power in the load = E2 / R.
So R = E2 / P.
R = (120)2 / 660 = 21.82 ohms (rounded)
That's the resistance of the heater ... as the question is worded, it's not clear that the
questioner understands this.
What else can I help you with?
Why does an electric water heater take more time to heat water in winters?
An electric water heater takes more time to heat water in winter because the incoming water is colder during this season. The heater has to work harder to raise the temperature of the cold water to the desired level, thereby taking longer to heat up the water.
What yields a higher heat output a electric heater with a higher or lower voltage?
Does not matter. But in a practical sense Its cheaper to get heat from high voltage because smaller wire, smaller breakers, and definitely less heat loss from the circuit wiring. It's called ixiR loss. Same reason overhead transmission lines are obcenely high voltage values. It is all relative. Heat equals this times that. Lower this, raise that. Horsepower equals this times that. Lower rpm, raise torque or vice versa. Navy wants planes to fly faster, lose weight, raise hydraulic pressure, reduce hydraulic line size. Electric, hydraulic, mechanical, it's all equal.
How can the relative magnitudes of the field in different regions be determined from an electric field line diagram?
The relative magnitudes of the field in different regions can be determined from an electric field line diagram by looking at the spacing between the field lines. Regions with field lines that are closer together represent stronger electric fields, while regions with field lines that are farther apart represent weaker electric fields. The density of field lines can give an indication of the relative magnitude of the electric field strength.
What is the basis of statement that lines of electric force begin end only in charges?
The basis for this statement is the concept of electric field lines originating from positive charges and terminating on negative charges. This is in accordance with the fundamental property of charges where opposite charges attract each other. Therefore, electric field lines cannot start or end in empty space, as they always originate from and terminate on charges.
Why can't electricity pass threw a magnetic field?
An electric current has no trouble at all passing through a magnetic field, however it is deflected. This is how the old CRT picture tubes that used to be used in TVs and computer monitors operated. In space electric currents deflected by magnetic fields actually follow helical paths along the lines of magnetic flux.
Where are the vacuum lines for the heater on a 2005 dodge ram 5.7 hemi?
The heater/ac doors are all electric. They are not vacuum controlled.
What are uses and applications of erw pipes?
Sch 40 electric resistance welded pipe is generally used for utility lines such as compressed air and water lines.
What describes resistance to movement to magnetic lines of force?
Resistance to movement of magnetic lines of force is described as reluctance. Reluctance is similar to resistance in an electric circuit and is a measure of the opposition that a magnetic circuit offers to the magnetic flux. It depends on the material and the geometry of the magnetic circuit.
How does resistance affect electric energy?
Resistance in a circuit causes a loss of electric energy in the form of heat. The higher the resistance in a circuit, the more energy is dissipated as heat, reducing the efficiency of the system. In practical applications, this heating effect can be beneficial (e.g., in electric heaters) or detrimental (e.g., in power lines where energy loss is undesirable).
How can I replace an electric water heater in my home?
To replace an electric water heater in your home, first turn off the power and water supply. Drain the old water heater and disconnect the electrical and plumbing connections. Remove the old water heater and install the new one in its place. Connect the electrical and plumbing lines, fill the tank with water, and turn the power back on.
When You replaced your 50 gallon electric water heater then filled and purged the water lines how long will it take to have hot water?
Ususally about an hour or so...
Why we are not using iron as a electric conductor?
Sometimes we are (high tension lines) - but it weighs too much and has too high a resistance for "normal" use.
How do you work the awd 4wd hi 4wd lo on the 2002 GMC Envoy?
It is electric and vacuum operated. Be sure all electrical connections are good and all vacuum lines are good. It is not unusual to find damaged vacuum lines.
What do lines represent in an electirc field diagram?
The lines in each diagram represent an electric field. The stronger the field, the close together the lines are.
What is Equipotential lines in electric field?
Equipotential lines in an electric field are imaginary lines that connect points having the same electric potential. Along these lines, no work is required to move a charge between the points, as the electric potential is the same. Equipotential lines are always perpendicular to electric field lines.
Why are the electric lines are on top of the pole?
Electric lines are on top of the pole to keep them out of the way.
Why does an electric water heater take more time to heat water in winters?
An electric water heater takes more time to heat water in winter because the incoming water is colder during this season. The heater has to work harder to raise the temperature of the cold water to the desired level, thereby taking longer to heat up the water.
