0
A filament's resistance value varies with temperature. When directly measuring resistance, the filament is off, and at or near room temperature. When the circuit is turned on to measure voltage and current, the filament's temperature will increase and the resistance value will increase. This makes it appear as though Ohm's law is wrong.
AnswerThere is no difficulty; your experiment will simply prove that the filament of the lamp doesn't obey Ohm's Law.
When you plot the results of current against voltage for a lamp's filament, obtained from your experiment, the result will be a curved line, indicating that the current is notproportional to voltage (due to a changing resistance). This shows that the filament doesn't obey Ohm's Law. To obey Ohm's Law, the result must be a straight-line graph.
Although the resistance of the lamp can be found at any point along the curve from the ratio of voltage to current (i.e. R = V/I) at that particular point, the lamp does not obey Ohm's Law. Ohm's Law only applies when the ratio of voltage to current remains constant throughout the experiment.
So no difficulty has arisen with your experiment, you have simply proved that Ohm's Law doesn't apply to the lamp filament. Believe your results!!
What else can I help you with?
Will a continuity check give you the value in ohms?
A: CONTINUITY check is not used to ascertain ohms value but rather the connections
How do you place 3 resistance to get the total resistance of 1 ohm?
It depends on the resistance of each resistor. If each resistor, for example, is 0.333 ohm, then you could connect them in series. If each resistor, for example, is 3 ohms, then you could connect them in parallel.
What is the function of the wires in a bulb?
The main wire in a bulb is the filament - which gets hot enough to give out light without burning away - and there are two other wires to take electricity to and from that filament.
How do I figure watts if I know voltage and ohms?
Volts time amps equals watts so watts divided by volts equal amps.
State ohms law and give the formula?
The Ohm's law is defined as voltage propositional to current. The equation given by V=IR R IS THE PROPOSITIONAL CONSTANT
Give example of animals which follow budding?
Hydra.
What is a filament Is it solved by using electricity terms?
A filament is part of a bulb.I will give you a full sentence. "The filament of a bulb is the part that gets hot and produces light"
Will a continuity check give you the value in ohms?
A: CONTINUITY check is not used to ascertain ohms value but rather the connections
How do you place 3 resistance to get the total resistance of 1 ohm?
It depends on the resistance of each resistor. If each resistor, for example, is 0.333 ohm, then you could connect them in series. If each resistor, for example, is 3 ohms, then you could connect them in parallel.
How will you follow the example of Nelson Mandela at home?
Yes , I beleive that I can follow the example of Nelson Mandela at home. Maybe in my country. Because he give freedom in South Africa.
What is a form of electricity that can produce heat and light?
An example of electricity that can produce heat and light is incandescent light bulbs. These bulbs use electricity to heat a filament inside, causing it to give off light and heat. The filament emits light as a result of being heated to a high temperature.
Do you set goals with your associates if so give an example of a goal and explain how you follow up on those goals?
no
What are the safety measures to follow in case of fire?
give 5 example of precautionaly measure in case of fire
Can you wire four eight ohm speakers to four ohms?
I presume you mean wired to four ohms amplifier output: In this case, pair the two speakers in in series which will make the give you 18 Ohms and then join the two pairs in parallel which will result in approximately eight ohms. Then connect then in that format to the amplifier. It will work for you.
What is the function of the wires in a bulb?
The main wire in a bulb is the filament - which gets hot enough to give out light without burning away - and there are two other wires to take electricity to and from that filament.
What resistance would produce a current of 120 amps from a volt battery?
Google Ohms Law. It will give you all the formulas you need to compute Ohms,Volts and Amps. Simple formulas :-)
What is the thin coil of wire inside a light bulb called?
If you are talking about an incandescent light bulb then its called a filament. It is thin so that it has a high level of resistance. Current going through the filament causes it to heat up and give off EM radiation in the spectrum of visible light.
