Turn a pencil into a resistor and experiment to see how changing length of the pencil effects the brightness of a light bulb in this simple circuits science project please enter a search term in the text box. Basic regulator integrated circuit (ic), the output voltage is kept constant at value of 15 connect the linear regulator ic and the variable resistor to the circuit use of pencil is not allowed experiment 1: single-phase full-wave rectifier and linear.
N0- the length of a pencil resistor has no effect on the output of a given circuit the alternative hypothesis for the experiment is as follows: n1- the length of a pencil resistor has an effect on the output of a given circuit. I thought the length of the pencil resistor would affect the output of the curcuit i guessed that the shorter resistor would allow the curcuit the most output after i tested three times, i concluded that the different lengths of the resistor did have an effect and the shorter resistor had the most effect. Ask an expert: graphite experiment moderators: kgudger, bfinio, madelineb, moderators these proportions also make the resistance per inch hard pencil lead will have higher resistance per unit of length i thought i could add a resistor to my circuit so i could still use a 9v battery in the end, i wanted to use my resistance results.
Given that the circuit is the same for all graphite samples (ie voltage input) and the samples are all the same size, then the independent variable (x) you are changing is the level of graphite and the dependant variable (y) is the measured resistance under the conditions of the experiment.
Transcript of pencil resistors science experiment what was my hypothesis if i change the length of a pencil in the circuit, then the luminosity of the lightbulb will change too materials i used: #2 pencils i learned that lead effects the electricity flowing through wire. After connecting the pencil resistor circuit as shown above, provide a power supply to the circuit from a 9v battery, and then observe the intensity of the bulb connected to the circuit through the free end adjustable copper wire connected to the opposite end (with respect to the green wire) of the graphite of the pencil such that the full. Test if the length of a pencil resistor effects the output of a circuit [ e ] how is the conductivity of distilled water affected when substances such as salt, sugar, vinegar or baking soda are added. Lessons in electric circuits, volume 1, chapter 5: series and parallel circuits begin this experiment with the pencil lead circuit pencils use a rod made of a graphite-clay mixture, not lead (the metal), to make black marks on paper experiment with different resistor networks and note the effects on total resistance range. Circuit science projects for elementary best conductors and insulators turn a pencil into a resistor and experiment to see how changing length of the pencil effects the brightness of a light bulb in this simple circuits science project.
The aim of this experiment is to test if the cross sectional area of a pencil resistor affects the output of the circuit experiment 3 the aim of this experiment is to test if the type of a pencil resistor (hb, 2h, 2b and 6b) affects the output of the circuit. Test if the length of a pencil resistor effects the output of a circuit in parallel and series affect the electric current and voltage in a circuit build a portable burglar alarm how experiment with ohm's and kirchhoff's laws useful links r=resource. Consider a pencil resistor do it yourself project circuit as shown in the below figure it consists of a pencil fixed on a cardboard, a free wire end to slide along the pencil’s lead graphite, an electric bulb, a battery and copper wires – all are used for connecting the circuit as shown in the below figure.