0
What else can I help you with?
What is the climate graph for the Mojave desert?
Describe the essential features of the climate of the Mojave Desert?
Prove Hall's theorem from Tutte' theorem graph theory?
in this theorem we will neglect the given resistance and in next step mean as second step we will solve
What is Ohm's law?
a law stating that electric current is proportional to voltage and inversely proportional to resistance.
The similarities between a bar graph and a pie graph?
their both graphs
What are climatograms?
A Desert Climatogram is a graph that shows the temperature and rainfall, for each month in the year, for the Desert. A Desert Climatogram is a graph that shows the temperature and rainfall, for each month in the year, for the Desert.
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).
Why do inversely proportional functions have asymptotes?
Because the two variables cannot be zero voltage = current*resistance if we draw graph current against resistance we would see a exponential graph which means the two variables are inversely proportional but either cannot be zero because voltage is not equal to 0 n.j.p
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.
Why is the resistance vs current graph is not linear?
resitance is inversly proportional to current when (v) is kept constant <><><><><> Because resistance is a function of temperature.
What does the voltage vs resistance graph illustrate in terms of the relationship between voltage and resistance?
The voltage vs resistance graph shows that there is a direct relationship between voltage and resistance. As resistance increases, the voltage required to maintain the same current also increases. This relationship is depicted by a linear graph where the slope represents the resistance.
Why is a graph of voltage against current for a filament bulb curved?
Because as current increases, heat increases and therefore resistance increases. Since resistance is the gradient of the graph, the gradient will increase and therefore the graph will curve. (The filament in the bulb is an non-ohmic conductor; its resistance is only constant at a constant temperature.)Another AnswerIncandescent lamp filaments are manufactured from tungsten. Tungsten is classified as 'non-ohmic' or 'non-linear', which means that (in common with most materials, in fact) it does not obey Ohm's Law. For a material to obey Ohm's Law, the ratio of voltage to current (i.e. its resistance) must remain constant for variations in voltage -as you have discovered, tungsten doesn't do this, producing a curve, rather than a linear, graph. As the original answer indicates, the temperature coefficient of resistance of tungsten in such that, as it gets warmer, its resistance increases.Those few materials that do obey Ohm's Law are called 'ohmic' or 'linear' materials.
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 does the voltage vs current graph represent and how can it be used to analyze the relationship between voltage and current in a circuit?
The voltage vs current graph represents the relationship between voltage (V) and current (I) in a circuit. It shows how the current flowing through a circuit changes in response to changes in voltage. By analyzing this graph, one can determine the resistance of the circuit, as resistance is equal to the slope of the graph (R V/I). This can help in understanding how voltage and current interact in a circuit and how different components affect the flow of electricity.
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.
Is there any similarity between the graphs plotted between voltage and current?
When you plot a graph of voltage against current, you can end up with a straight line or a curved line.If you have a straight line, then it shows that the change in current is directly proportional to the change in voltage and, so, the circuit is obeying Ohm's Law. If the graph is a curve, then the change in current is not proportional to the change in voltage and, so, the circuit is not obeying Ohm's Law.In the case of a straight-line graph, the gradient of the graph indicates the resistance of the circuit. The greater the gradient, the higher the circuit resistance.In the case of a curved-line graph, the gradient (i.e. the tangent) at each point along that curve will indicate the (changing) resistance at each of those points.
Why isn't the resistance of a torch bulb a straight line on a graph?
The resistance of a torch bulb is not a straight line on a graph because its resistance changes with temperature. As current flows through the filament, it heats up and its resistance increases due to the temperature coefficient of the material, typically tungsten. This non-linear relationship results in a curved graph when plotting current versus voltage, demonstrating that the bulb does not obey Ohm's Law under all conditions. Thus, the behavior of the filament varies with changes in electrical current and temperature.
Why is the gradient on a current-potential difference graph not the resistance?
Resistance is defined by R = V/I where V is potential difference and I is current. It is not: change in pd / change in current - which would be the gradient of the curve. Thus to measure the resistance at a particular pd we simply read off the current at that pd and use the equation above. The problem stems from the way resistors are introduced before non-ohmic components, and for ohmic components it may appear that the gradient is being used for the resistance.
