0
If the resistor is conducting electrical current, then the power it dissipates (heat energy per second) is
(current through it)2 times (22,000)
or
(voltage across it)2 divided by (22,000).
If the resistor is connected in an unpowered circuit, or stored in a drawer, then it dissipates zero heat.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
What is the purpose of a resistor in an electronic circuit If the resistor converts energy to heat then are you wasting energy any time you use a resistor?
In its simplest use a resistor in a circuit is used to limit the amount of current flow, or to decrease the amount of voltage applied to a device. One example is you had a 12 volt battery and you need/ wanted to connect it to a device that ran on 9 volts then a resistor can be chosen to reduce the 12 volts to the 9 volts required.
How to calculate the heat produced in a resistor?
Resistors dissipate heat energy with power P=I2R. Since power is defined as energy gained or lost per unit time, we can solve for the energy lost using E=Pt, where E is energy (joules), P is power, and t is time (seconds).Finally, substituting the definition of power into the equation you get:E=I2RtAnswerWith difficulty. The original answer, unfortunately, tells us the work done on the resistor and not the heat transfer from the resistor, which is what the questioner is asking.The work done on the resistor is the product of the square of the current and the value of its resistance. This will increase the internal energy of the resistor and increase its temperature above that of its surroundings, and heat, by definition, is the energy transferred from the higher temperature resistor to its cooler surroundings.So there are simply too many unknown variables to take into account: the mass of the resistor, the specific heat capacity of the material from which it's made, the temperature difference between the resistor and its surroundings...
If 2 resistors or resistance 10 ohm and 5 ohm resp r connected in parallel which will get more heated?
The 5 Ohm resistor will have more current passing through it than the 10 ohm resistor. Since the resistors are in parallel the Voltage across each resistor is the same. Power or the amount of heat in terms of the question can be derived from Power = Voltage * Current. Ohm's law tells us that the current flowing through a resistor is equal to the Voltage across the resistor divided by the resistance. The formula for power is then the Voltage * Voltage / Resistance. Since V^2 / 10 is smaller than V^2 / 5 we know that the 5 ohm resistor will always have more power dissipated than the 10 ohm resistor.
Ac power that is converted to heat in a resistor is known as?
real power (as opposed to imaginary power, which is not dissipated)
What is the purpose a nuclear reactor?
To produce heat.
How heat is produced inside the resistor?
heat is produce when you rubbed two things together...ex. stones
How does heater makes the whole room warm?
The heater contains a resistor. When high voltage is passed it produce a large amount of heat the blower situated in the heater blows this heat which diffuses in the room to make the room hot.
What do a resistor do in a circuit?
A resistor is a device that impedes or limits the flow of electrical current in a circuit. It converts the current's electrical energy into heat (thermal) energy. A resistor reduces the amount of energy in a circuit and pumps it out as a heat.
What does a resistor do in in a circuit?
A resistor is a device that impedes or limits the flow of electrical current in a circuit. It converts the current's electrical energy into heat (thermal) energy. A resistor reduces the amount of energy in a circuit and pumps it out as a heat.
Do incandescent and fluorescent bulbs produce the same amount of heat?
No, incandescent and fluorescent bulbs do not produce the same amount of heat.
What are the advantages of heat energy?
Heat energy is the amount of heat used to energize or to produce heat.
What is the energy transfer in an iron?
In heat.Because iron absorbs heat.
In roughness measureing system what is RMS value?
RMS value is defined as "The amount of ac supply required to make same heat effect in resistor , which is made by dc current, in that resistor"
What is the relationship between appliances power rating and the amount of heat it produce?
power rating is the rate of moving energy their relationship in the amount of heat it produce it divided by time to move that much energy
Does a resistor create light or heat?
A resistor stops the flow of electrons causing them to collide and producing heat
How do you find power generated in a resistor?
The power generated in a resistor is converted into heat. and that can be power which is converted into heat is the product of the voltage across the resistor and, current passing through the resistor. or the product of square of the current and the resistance offered by the resistor.
How does electrical energy produce a form of energy we use?
It can be run through a resistor to produce heat, as in a convector heater, tumble dryer, toaster. It can be used to run electric lights, and it can be used to drive electric motors that produce mechanical energy.
