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If a current of 4.5 amps flows into a 3.5 ohm resistor for 5.5 minuits the energy dissipated is?
Wiki User
∙ 14y ago
The power dissipated by a resistance ' R ' carrying a current ' I ' is [ I2R ].
I2R = (4.5)2 x (3.5) watts = 70.875 joules per second
5.5 minutes = (5.5 x 60) = 330 seconds
Energy = (power) x (time) = (70.875) x (330) = 23,388.75 joules
Wiki User
∙ 14y ago
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What effect does energy have on a resistor?
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What device could not provide the energy for current to flow in a circuit?
a resistor
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If you know the voltage applied to a resistor and the value of the resistor how would you determine the power dissipated in the resistor.?
Power dissipation of a resistor or any load is the amount of power (in watts) that is converted to heat, light, or other form of energy. In a resistor, power dissipation is defined by Ohm's law P = I^2 * R Power dissipated equals current through the resistor squared times the resistance in ohms. Since the power is converted to heat, a resistor has a maximum dissipation rating set by the manufacturer, above which the resistor will be damaged.
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...
Is an resistor an conductor or a insulator?
A resistor is a conductor that dissipates some of the electrical energy fromthe current flowing through it. The energy dissipated by the resistor is(current through it)2 x (resistance)
How are power dissipated in a load or in a resistor?
Due to energy usage and/or the reduction in conductance (increase in resistance) in a given load or resistor, some electrical energy is lost through that component. As such, a proportional drop in current and voltage occurs.
What effect does energy have on a resistor?
One way to look at the purpose of a resistor is as a device built to dissipateelectrical energy. Some (but usually not all) of the energy of the current througha circuit is always dissipated when it flows through a resistor. The energy lostleaves the resistor in the form of heat.The number of joules of electrical energy lost and heat dissipated by the resistor is(amperes of current through the resistor)2 x (ohms of resistance) x (seconds of time it continues)If you work with resistors often, or see several of them inside an old radio, you noticethat there are physically big ones and physically small ones. The size of the resistorisn't related to the number of ohms of resistance it has. The physical size is relatedto how fast it can dissipate energy (heat) without melting or burning up. A biggerresistor has more air around it, so it can get rid of heat faster.
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.
What is dissipated energy?
Dissipated energy is the energy that is spread into the environment or lost
What is energy that is dissipated in a crash?
Kinetic Energy is energy that is dissipated in a crash.
If current in an electric stove is doubled how will the thermal energy produced per unit time change?
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Energy that is dissipated in a crash is called?
Kinetic Energy is energy that is dissipated in a crash.
What slows down current and converts electrical energy into other forms of energy?
That sounds like a resistor. However, please note that "slow down a current" is not a very accurate description of what happens. What the resistor does is take energy away from the current.
What is the relationship between the resistance of a material and the amount of thermal energy that is released when electrons move through the conductor?
It isn't QUITE as simple as that. The relevant formula is: (power dissipated) = (current squared) x (resistance)So, the amount of energy dissipated not only depends on the resistance, but also on the current (that's what is measured in amperes). For example, if there is no current, there will be no power dissipated. The formula is about POWER; to get ENERGY, which is what you asked for, you need to multiply power by time.
What device could not provide the energy for current to flow in a circuit?
a resistor
