0
Even without looking up the electrical specifications of the product, we know that
its electrical resistance is relatively low. Any device designed to produce heat must
have a low resistance.
Let's just pull some numbers out of the air:
-- 1500 square feet in the house
-- industry recommends 35 BTU per square foot in your area ==> 52,500 BTU furnace required
-- 3,400 BTU ==> 1 KW; 52,500 BTU ==> 15.4 KW
-- to operate from 240 VAC
Power = E2 / R
15,400 = (240)2 / R
R = (240)2/15,400 = 3.74 ohms
And that's just the heating coils. The big air-mover fans that distribute the
heated air throughout the house are also in parallel, so the load across the
240V service when the furnace is running is less than 3.74 ohms.
We're guessing that electric furnaces don't operate from a normal 120VAC line.
If one did, the corresponding resistance to produce the same amount of heat
would be 0.935 ohm !
What else can I help you with?
What does a variable resistor do and how does it affect the flow of electric current in a circuit?
A variable resistor is a component that can change its resistance value. By adjusting the resistance, it can control the flow of electric current in a circuit. Increasing the resistance reduces the current flow, while decreasing the resistance increases the current flow. This allows for precise control of the current in a circuit.
Is higher specific resistance more conductive?
No, higher specific resistance means lower conductivity. Specific resistance is the resistance of a material per unit length and cross-sectional area, so a higher value indicates that the material resists the flow of electric current more effectively. Conversely, materials with lower specific resistance values are more conductive.
How to find the potential difference across a resistor in an electric circuit?
To find the potential difference across a resistor in an electric circuit, you can use Ohm's Law, which states that voltage (V) equals current (I) multiplied by resistance (R). So, you can calculate the potential difference by multiplying the current flowing through the resistor by the resistance value of the resistor.
Is it possible for electric flux to have a negative value?
Yes, electric flux can have a negative value if the electric field and the area vector have opposite directions.
What is the difference between resistor and resistance?
Resistance is the property of a conductor, which determines the quantity of current that passes through it when a potential difference is applied across it. A resistor is a electrical componet with a predetermined electrical resistance, like 1 ohm, 10 ohms 100 ohms 10000 ohms etc.. depending on how much current you want to pass through a circuit, you would design the circuit with the required resistors
What is resistence tolerence?
The typical spread (deviation) from the nominal value of the resistance of several resistors.
Does R value means the resistance a material has to the flow of heat?
No, to the flow of electric current.
What are the benefits of upgrading to a more energy-efficient electric furnace and AC system for your home?
Upgrading to a more energy-efficient electric furnace and AC system for your home can lead to lower energy bills, reduced environmental impact, improved indoor comfort, and potentially increased home value.
What is a resister in electronics?
The resistor a passive component is oppose the flow of electric current. How much it oppose to current it depend on the value of resistance and the value of resistance is mention on it on the color code format. you need to remember the value of every color.
Blast furnace gas calorific value?
Blast furnace calorific value is 780 Kcal/hr
What can resistance do?
U didn't clearify resistance in what aspect. If u mean electrical resistance,Resistance is phenomenum which describes the limitation of the flow of electric current in an electrical circuit. According to Ohms law (V=IR),the value of resistance is directly proportional to the value of voltage and inversely proportional to the value of current.That is,as the value of resustance increased,voltage also increases;also if the valur of resistance increases,the current reduces(as in I=V/R)
How do you calculate chlorific value of furnace oil?
how we can calculate the gram chlorific value of an furnace oil pl answer me i will thank full to you
What does a variable resistor do and how does it affect the flow of electric current in a circuit?
A variable resistor is a component that can change its resistance value. By adjusting the resistance, it can control the flow of electric current in a circuit. Increasing the resistance reduces the current flow, while decreasing the resistance increases the current flow. This allows for precise control of the current in a circuit.
Where can you find the cable resistance value per feet?
In the National Electric Code Book or in an Ugly's Electrical Reference book.
What is the calorific value of furnace oil?
5030
What is a math typical value?
The mean is that value that is most commonly referred to as the average.The typical value is a synonym for the mean and average.The typical value is the mean.
How does an electric furnace work?
The operation of the furnace depends upon the thermostat, which is a simple unit that like a thermometer. which has set at a particular temperature. If this value falls below the set level on the thermostat, then the house starts to become colder, which alerts the electric furnace that is usually situated in the basement of a building. The heated coil in turn heats the temperature of the air around it. This air is then routinely blown into the house through a blower, the pressure that is exerted by the blower on the heated air warms it further. This air is blown into the house and the uncomfortably low temperature rises to a very pleasing level. The cold air that was initially present in the house replaces the hot air in the electric furnace
