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the resistance of an incandescent lamp is very low until it reaches its operating temperature of 6000deg K or so

get a sixty watt bulb and measure its resistance chances are its under 5 ohms

depending on the mass of tungsten it takes a few cycles at this 60 amps to get up to temperature.

voltage is constant calling the wiring a voltage source (if the wiring didnt have resistance the bulbs of higher wattages would probably burn out when starting)

fluorescent lamps have a bit of Mercury in a near vacuum nearly infinite resistance when cold

it is heated to boiling with a combination of either filaments and/or high voltage

then the gas changes to plasma and its in essence a better conductor than solid metal at that temperature 9000K or so

an 8foot tube starts at 800v to 1000v and may run at under 100

depending on the ballast (preheat. rapid start. instant start)

and the power (normal,HO,VHO,SHO)

the ballast mostly limits the current the plasma can consume but is necessary to start the plasma conducting in longer tubes

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Q: Slope of the volts vs resistance characteristics for fluroscent and incandescent lamps?
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Continue Learning about Electrical Engineering

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.


What is the incremental resistance obtained from the diode equation?

The incremental resistance of a diode is the inverse of the slope of the V-I curve at the operating point.


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The dc load resistance is Rc but the AC Load resistance is (RcRl). If a load line is drawn the slope of which is -1(Rc Rl) . Then it is called an AC load line and it is to be used when the transistor is operating as an amplifier.


Why does slope overload occur in delta modulation?

To reduce slope overload distortion ,the step size must be increased when the slope of the input signal is high. The sawtooth is better able to match the message in the regions of steep slope.


What is dynamic resistance of diode?

The Current-Voltage relationship of a diode is not constant (not a straight line) and hence the resistance cannot be measured. Due to this non-linear nature of the the curve, there exists a unique value of resistance at every point of the curve which is called dynamic resistance (not static of constant resistance). The dynamic resistance equals the change in voltage divided by the change in current, when the voltage is changed by a small amount. In other words it is the slope of the graph of voltage against current. The dynamic resistance is different at different current values. About 30 years ago, and I do not remeber the brand or maker, there was a digital multimeter that DID measure dynamic resistance in diodes. It was a God Send for testing diodes in circuit. Diodes only conduct in one direction, so the device would show an open in one direction and a resistance under 1000 ohms on the other or a short (0 ohms).

Related questions

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


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 are the characteristics of an inclined plane?

slope, lenth and hight


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 is the name for a superheated incandescent cloud of gas and volcanic ash that travels swiftly down a volcanic slope as an avalanche?

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What does the slope of voltage-current curve represent?

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What is the nature of the slope of the viltage vs resistance in filament lamp?

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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