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The relationship between the voltage and resistance in a filament lamp is non-linear. As the voltage increases, the resistance in the filament of the lamp also increases due to the heating effect. This increase in resistance causes the current to increase at a slower rate than expected, leading to a non-linear slope in the voltage-resistance graph.
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How do you find resistance by a graph?
To find resistance from a graph of voltage vs. current, you can calculate the slope of the graph. Resistance is equal to the slope, so you can divide the voltage by the current to determine the resistance. The unit of resistance is ohms (Ω).
What does the slope of a graph potential difference vs current represent?
The slope of a graph of potential difference vs current represents the resistance of the component or circuit being analyzed. It is calculated using Ohm's Law: V = IR, where V is the potential difference, I is the current, and R is the resistance. A steeper slope indicates a higher resistance, while a shallower slope indicates a lower resistance.
What is physical meaning of slope for voltages vs current graphs?
The slope of a voltage vs. current graph represents the resistance in the circuit. It indicates how the voltage changes with respect to the current flowing through the circuit. A steeper slope indicates higher resistance, while a shallower slope indicates lower resistance.
What does the slope of resistance Vs temperature curve gives?
The slope of a resistance vs. temperature curve gives the temperature coefficient of resistance, which quantifies how much the resistance of a material changes with temperature. Positive values indicate the resistance increases with temperature (e.g., in most metals), while negative values indicate the resistance decreases with temperature (e.g., in semiconductors).
What does the slope of a friction vs weight graph mean?
The slope of a friction vs weight graph represents the coefficient of friction, which is a measure of the resistance encountered when one object slides over another. A higher slope indicates greater friction between the two surfaces, while a lower slope indicates less resistance.
What is the nature of the slope of the voltage-resistance characteristics for the carbon lamp?
for Tungsten lamp the slope of the curve is positive where for carbon it is negative
Why slope of VI characteristics is positive for tungsten lamp?
The slope of the voltage-current (VI) characteristics for a tungsten lamp is positive because as the current increases, the temperature of the tungsten filament rises, leading to an increase in resistance. This phenomenon is due to the positive temperature coefficient of resistance of tungsten, where the resistance increases with temperature. Consequently, the relationship between voltage and current becomes non-linear, resulting in a positive slope in the VI characteristics. This behavior is typical for incandescent lamps, where the filament's temperature significantly affects its electrical properties.
Why the slope of voltage-resistance characteristic increases in the case of tungsten lamp and decresing in case of carbon lamp?
If the filament really was made from a material that has a negative temperature coefficient (as temperature increases, resistance decreases) then the decreasing resistance would cause more and more current to be taken as the lamp heated up and the temperature would get higher and higher in a runaway manner until either the power supply's breaker would trip or (more likely) the light bulb's filament would simply burn open. In fact the filament has to be made from a material that has a positive temperature coefficient. (As temperature increases, resistance increases.) Then, as the bulb's temperature rises, its filament's increasing resistance causes less current to be taken than when it was cold. Quite quickly a stable "steady-state" temperature and "running" resistance is reached so that the bulb simply continues to give out a steady amount of light according to the current it is taking from the electricity supply.
How do you find resistance by a graph?
To find resistance from a graph of voltage vs. current, you can calculate the slope of the graph. Resistance is equal to the slope, so you can divide the voltage by the current to determine the resistance. The unit of resistance is ohms (Ω).
What does the slope of a graph potential difference vs current represent?
The slope of a graph of potential difference vs current represents the resistance of the component or circuit being analyzed. It is calculated using Ohm's Law: V = IR, where V is the potential difference, I is the current, and R is the resistance. A steeper slope indicates a higher resistance, while a shallower slope indicates a lower resistance.
What is physical meaning of slope for voltages vs current graphs?
The slope of a voltage vs. current graph represents the resistance in the circuit. It indicates how the voltage changes with respect to the current flowing through the circuit. A steeper slope indicates higher resistance, while a shallower slope indicates lower resistance.
What does the slope of resistance Vs temperature curve gives?
The slope of a resistance vs. temperature curve gives the temperature coefficient of resistance, which quantifies how much the resistance of a material changes with temperature. Positive values indicate the resistance increases with temperature (e.g., in most metals), while negative values indicate the resistance decreases with temperature (e.g., in semiconductors).
How does a slope affect velocity?
the steeper the slope, the faster the velocity because the pull of gravity will be applied more since the resistance will be lower.
What does the slope of voltage-current curve represent?
It depends. If voltage is drawn along the horizontal axis, then the slope at any point on the graph represents the reciprocal of resistance at that point. If current is drawn along the horizontal axis, then the slope at any point on the graph represents the resistance at that point.
How does the steepness of the graph relate to the resistance?
The steepness of a graph, particularly in a voltage-current (V-I) graph, indicates the resistance of a circuit element according to Ohm's Law (V = IR). A steeper slope signifies higher resistance, as it shows that a greater voltage is required to produce a given current. Conversely, a less steep slope indicates lower resistance, meaning less voltage is needed for the same current. Thus, the slope of the graph inversely reflects the resistance: steeper slopes correspond to higher resistance values.
When you walk up an inclined plane your legs supply the effort force What is the resistance force?
the resistance force is the slope of the plane, or the hypotenuse.
What does the slope of a friction vs weight graph mean?
The slope of a friction vs weight graph represents the coefficient of friction, which is a measure of the resistance encountered when one object slides over another. A higher slope indicates greater friction between the two surfaces, while a lower slope indicates less resistance.
