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How does the heat produced by a current passing through a fixed resistance wire depend on the magnitude of current?
The formula for the heat produced in a wire is P = I2R, where P is the power (the amount of electrical energy wasted, which is the amount of heat produced), I is the current and R is the resistance. In other words, other things being equal, the power is proportional to the square of the current. When transmitting electrical energy over large distances, fairly high voltages are used (typically, several 100 kV), because that way, less current is required, and power losses are reduced.
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What is joule's law of heating?
The heat produced due to electric current through a resistance is i) directly proportional to the square of the current ii) directly proportional to the resistance value of the conductor iii) directly proportional to the time of flow of current.
State three factors on which the heat produced by an electric current depends?
The heat produced by an electric current depends on the resistance of the material through which the current is passing, the square of the current flowing through the material, and the duration for which the current flows.
How an object opposes an electrical current passing through it?
An object can oppose an electrical current passing through it by having resistance. This resistance limits the flow of electrons, causing a drop in voltage and generating heat. Materials with high resistance, such as insulators like rubber or glass, will strongly oppose the flow of current.
What are the effects of the resistance of a filament wire?
The resistance of a filament wire affects the amount of current passing through it and the amount of heat produced. Higher resistance leads to higher heat generation and light emission, resulting in brighter light. However, too much resistance can cause the filament to overheat and fail prematurely.
What can be inferred about the current passing through the bulb?
The current passing through the bulb is directly related to the voltage applied across it and the resistance of the bulb. Using Ohm's Law (I = V/R), we can calculate the current flowing through the bulb by knowing the voltage and resistance values. Additionally, the brightness of the bulb can also be an indicator of the current passing through it, as higher current typically results in a brighter bulb.
In a parallel ac circuit is the current additive?
Yes In parallel circuit , current entering into the circuit will be divided intodifferent paths ( resistances) . Amount of current flow depends upon the magnitude of resistance applied in the circuit. Total current after passing through the circuit will be the sum of all current through each resistance.
What is joule's law of heating?
The heat produced due to electric current through a resistance is i) directly proportional to the square of the current ii) directly proportional to the resistance value of the conductor iii) directly proportional to the time of flow of current.
State three factors on which the heat produced by an electric current depends?
The heat produced by an electric current depends on the resistance of the material through which the current is passing, the square of the current flowing through the material, and the duration for which the current flows.
How does the heat produce by a current passing through a fixed resistance wire depend on the magnitude of current?
The formula for the heat produced in a wire is P = I2R, where P is the power (the amount of electrical energy wasted, which is the amount of heat produced), I is the current and R is the resistance. In other words, other things being equal, the power is proportional to the square of the current. When transmitting electrical energy over large distances, fairly high voltages are used (typically, several 100 kV), because that way, less current is required, and power losses are reduced.
How an object opposes an electrical current passing through it?
An object can oppose an electrical current passing through it by having resistance. This resistance limits the flow of electrons, causing a drop in voltage and generating heat. Materials with high resistance, such as insulators like rubber or glass, will strongly oppose the flow of current.
What are the effects of the resistance of a filament wire?
The resistance of a filament wire affects the amount of current passing through it and the amount of heat produced. Higher resistance leads to higher heat generation and light emission, resulting in brighter light. However, too much resistance can cause the filament to overheat and fail prematurely.
What can be inferred about the current passing through the bulb?
The current passing through the bulb is directly related to the voltage applied across it and the resistance of the bulb. Using Ohm's Law (I = V/R), we can calculate the current flowing through the bulb by knowing the voltage and resistance values. Additionally, the brightness of the bulb can also be an indicator of the current passing through it, as higher current typically results in a brighter bulb.
What wires carry current?
A wire with some resistance and a voltage applied to it The amount of current I passing this wire is V/R
Why you cannot measure the resistance of a resistor when there is current passing through it?
you can if you know the current measure the voltage across the resistor E=I*R there is actually no way to measure the resistance without passing current thru it P=I*E E=I*R any 2 will give you the other 2
What is the cause of resistance and how the resistance and how the resistance of a wire can be determined?
Electrical resistance can be determined by the equation that defines resistance - Ohm's Law. Just divide the voltage across a resistor, by the current passing through it.
What is the relationship between the size of the electric current passing through a length of wire and its heating effect?
The heating effect of a wire is directly proportional to the square of the current passing through it. This relationship is described by Joule's Law, which states that the heat produced is equal to the current squared multiplied by the resistance of the wire and the time for which the current flows.
Why heat is produced when current is passed through a conductor?
When current passes through a conductor, the electrons collide with atoms in the conductor, causing them to vibrate and generate heat. This is because the collisions lead to an increase in kinetic energy, which is released in the form of heat. The amount of heat produced is directly proportional to the resistance of the conductor and the square of the current passing through it, as described by Joule's Law.
