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What is the theory behind the V-I characteristics of incandescent lamp?
Wiki User
∙ 11y ago
Ohm's law V=IxR. Resistance R is small when the bulb is off, it rises as the bulb heats up. So the starting current is larger than the running current. But the extra power used in starting is very very small.
Wiki User
∙ 11y ago
Wiki User
∙ 11y agoWhen we plot the voltage/current graph, it's usual to plot the voltage (the dependent variable) along the horizontal axis, and the current along the vertical axis. For an incandescent lamp, the resulting graph will be a curve -i.e. non-linear- confirming that the metal does not obey Ohm's Law. This means that the resistance at any point along the graph will be the reciprocal of the tangent of the curve at that particular point. Lamps of different power ratings will produce two different curves, with the more powerful lamp having the lower resistance values at corresponding voltages.
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Why is an incandescent lamp cool to the touch when it gives off heat?
An incandescent lamp is not cool to the touch unless it is an extremely low wattage. Heat given off by incandescent lamps is one of the drawbacks of the lamp. Total overall efficiency is reduced by the wasted heat.
Can you use an incandescent light bulb in a full spectrum lamp?
no
Light frequency from an incandescent lamp depends on what?
The peak Frequency
What is equal to 60 watt in CFL?
If the question is what wattage compact fluorescent (CFL) lamp has a similar light output to an incandescent lamp of a given wattage, the ratio is usually about 4. A 60W incandescent can be replaced by an 13-15 W CFL lamp. A 60W CFL lamp can replace a 300W incandescent lamp.
What is the most economical incandescent bulb 10 watts or fluorescent lamp 10 watts and why?
the most economical is the incandescent bulb because the power of bulb is low only while the fluorescent lamp is low and additional the power of ballast from 10%-20% power consumed.but the fluorescent lamp is 5 times brightly the incandescent bulb.
What can an incandescent test lamp is used to check?
An incandescent lamp can be used to check continuity of a circuit.
What light sources emits only a continuous spectrum a. hydrogen gas b. mercury lamp c. sodium lamp d. incandescent lamp e. laser?
d. incandescent lamp
Is CO2 emitted by incandescent bulb?
No, carbon dioxide is not emitted by an incandescent lamp.
Why is an incandescent lamp cool to the touch when it gives off heat?
An incandescent lamp is not cool to the touch unless it is an extremely low wattage. Heat given off by incandescent lamps is one of the drawbacks of the lamp. Total overall efficiency is reduced by the wasted heat.
Why was the incandescent lamp not used in homes?
The incandescent lamps are very frequently used in all the buildings !
Who was rewarded for his patent incandescent lamp?
Alexander Lodygin
What was the first name of the light bulb?
The Incandescent Lamp
What is another word for light bulb?
Incandescent lamp
Where did Edison invents a practical incandescent lamp?
1859
What part of the lamp converts electricity to light?
For a filament-type (incandescent) lamp, it's the filament.
Who invented the gas-filled incandescent lamp in 1932?
Langmuir
Light frequency from an incandescent lamp depends on what?
The peak Frequency
