How the Resistance of a Filament Bulb Varies Its Current Flowing through It
Aim: the purpose of this investigation is to find out how the
resistance of a filament bulb varies with current flowing through it.
Hypothesis: I think the higher the voltage the brighter the bulb will
be because then there will be an increase of current and the electrons
are given more energy and more are forced through, therefore the bulb
would be able to resist more. If the voltage increases the bulb will
shine bright because the bulb would have more energy.
Controlled Variable- the controlled variable for this experiment is
number of bulbs because the decision is for me to make.
Independent Variable- the independent variable for this experiment are
the volts, I will be using 1-12v.
Independent Variable- The independent variable would be the reading we
get of the ammeter.
Apparatus-
* 5 wires
* 1 filament bulb
* 1 resister
* 1 voltage meter
* 5-10 crocodile clips
* Ammeter
Method-First of all I drew the circuit so that it easier for me when I
go to set up all the equipment, than I will to connect what to what.
After drawing the circuit I gathered all the apparatus that I need for
this experiment. After setting them what I will have to do is connect
and wire them up so that the circuit is ready to go. I plan to do my
experiment with 5 bulbs to make it fair. However as I can see I don’t
think I will have enough time to get it done therefore I will only do
it for 2 to 3 bulbs. After taking down the Results for that I drew
another circuit which is without the Resister. And started taking down
the Results.
Circuit
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Result- R=V/I this how I figure out the resistance for this
experiment.
1 bulb with a Resister
Now that you have an idea on the parts and tools needed for the conversion, it's time to...
I then figured out when, what and where our lights were going to be on, off and what colour. Also sounding and V.O cues.
there should not be any deadlines so that the author has pleanty of time to complete the
In this document there will be a breakdown of the steps which will help i...
Investigating the Resistance of a 12 Volt Bulb When the Current Changes Prediction: I predict that as the current increases the temperature of the lamp will also increase; therefore the resistance will also increase. I know this because I have read it in the AQA syllabus. Plan Safety: I need to ensure the safety of myself and others by making sure that the experiment is conducted accurately and safely. - Apparatus should be placed in a safe place and put away safely. - Electrical plugs should be switched off after use.
5. Check it. If it is right prove it by using the next shape in the
I can do this by setting up the diagram above. You need to get a
mean that we will to set up the apparatus in a way that would give us
Pogue, David. "New Reasons To Change Light Bulbs." The New York Times 21 Mar. 2013, New York ed.: B1. Print.
the number of wires used, each bit of wire was cut into lengths of 30
(add the number of bubbles for each trial of a light source and divide by 5)
The next step is putting the computer together. First you will need to put the
Light bulb is one of the most influential inventions in the word. It makes us work more productive at night and helps us enjoy more activities at night. It significantly change people lives all over the world. The born of light bulb also helped us by making more inventions that related to light, such as phones, televisions, and computes. By using light bulb, we actually reduced the probability of having fire accidents because if we don’t have light bulb, we will use candles instead which can cause fire easily. There are a lot more benefits we get from light bulb, and all of these are credited to Thomas Alva Edison.
Numerous factors influence electrical conductivity and resistance, two of them are temperature and length of the wire (these are external factors). Electrical conductivity is defined as the property used to describe how well materials allow electrons to flow, and the degree to which a specific material conducts electricity., Electrical conductivity is calculated as the ratio of the current density in the material to the electric field that causes the flow of current. The SI unit of electrical conductivity is Siemens per meter (S/m). Electrical conductivity is also commonly represented by the Greek letter σ (sigma), but κ (kappa) (especially in electrical engineering) or γ (gamma) are alsowhich are occasionally used. Electrical resistivity quantifies how strongly a specific material opposes the flow of electric current. Electrical resistivity is commonly represented by the Greek letter ρ (rho). The SI unit of electrical resistivity is the ohm⋅metre (Ω⋅m) although other units like ohm⋅centimetre (Ω⋅cm) are also in use.