The dependent variable is the resistance, and the independent variable is the length of the wire as the length of the wire doubles, so does the resistance this can be proved by showing the resistance of the wire when it is 50cm and 100cm. For each wire plot a graph of resistance (y-axis) against length the resistance of a wire is given by the equation: r = ρ x l/a where r is resistance, ρ (pronounced 'rho') is the resistivity of the wire, l is length and a is its cross-sectional area. It is called the dependent variable because we are trying to figure out whether its value depends on the value of the independent variable if there is a direct link between the two types of variables (independent and dependent) then you may be uncovering a cause and effect relationship. - dependent variables are quantities you are measuring to determine if there is an effect from the independent variable you do not manipulate the dependent variable directly you are changing the independent variable and seeing if the dependent variable changes because is depends on the independent variable.
A light-dependent resistor, alternatively called an ldr, photoresistor, photoconductor, or photocell, is a variable resistor whose value decreases with increasing incident light intensity an ldr is made of a high-resistance semiconductor if light falling on the device is of high enough frequency, photons absorbed by the semiconductor give bound electrons enough energy to jump into the. The dependent variable is the event expected to change when the independent variable is manipulated in data mining tools (for multivariate statistics and machine learning), the dependent variable is assigned a role as target variable (or in some tools as label attribute), while an independent variable may be assigned a role as regular variable. The light dependent resistor, ldr, is known by many names including the photoresistor, photo resistor, photoconductor, photoconductive cell, or simply the photocell it is probably the term photocell that is most widely used in data and instruction sheets for domestic equipment.
The resistance value of a wire is dependent on three parameters its resistivity, cross-sectional area and length as an example, consider a wirewound resistor with a wire of nichrome with a resistivity of 110×10 −6 ωm. Physics 111 laboratory experiment #3 current, voltage and resistance in series and parallel circuits this experiment is designed to investigate the relationship between current and potential in simple series and parallel resistor circuits using ideas of conservation of energy and conservation of. A variable resistor is the most significant component found in many electrical devices for controlling the tone, bass as well as volume there are many uses for a variable resistor (potentiometer), but the most common is to change the amount of current that can get through a circuit. Varistor is a voltage dependent resistorthe resistance of a varistor is varied depends on the voltage applied here know about varistor circuit with working varistor is a voltage dependent resistorthe resistance of a varistor is varied depends on the voltage applied thin film resistors, metal film resistors), & variable resistors (wire.
Light dependant resistor: a light dependant resistor (or ldr) is a special type of resistor that varies its resistance value according to the amount of light falling on it when it is in the dark, an ldr will typically have a very high resistance (eg millions of ohms), but this will fall to just a few hundred ohms when the ldr is exposed to. A light-dependent resistor is also a variable resistor but is controlled by the light versus turning a knob the resistance in the circuit changes with the intensity of the light these are often found in exterior lights that automatically turn on at dusk and off at dawn. Light dependent resistor / photoresistor: light dependent resistors or photoresistors change their resistance with the level of light they are used in a number of sensor applications and provide a very cost effective solution in many instances.
Statisticslecturescom - where you can find free lectures, videos, and exercises, as well as get your questions answered on our forums. Introduction charge moves more readily through some materials than through others the resistance of the variable resistor in fig20 depends on the length of the wire figure 20 a variable resistor if the sliding contact is at terminal b, the charge has to pass through several turns of resistance wire before leaving. Resistance (r) = (resistivity x length) / 4(d/2)squared where resistance is the dependant variable, diameter of wire (d) is the dependant variable what i got was 2 times square root r = (2 x resisitivity x length) x 1/d.
Constantan wire variables the dependent variables in the length experiment were the wire (34 sphysics control assessment main experiment actual method: firstlyw it could be damaged which would affect my uncertainties and my results reliabilityw. Regardless of the type of light dependent resistor or photoresistor, both types exhibit an increase in conductivity or fall in resistance with increasing levels of incident light ldr symbol the ldr symbol used in circuits is based around the resistor circuit symbol, but shows the light, in the form of arrows shining on it. A variable resistor works by adjusting the path that current has to flow inside the resistor is a strip of metal or conducting ceramic which is connected to one part of the circuit the dial you turn will move another piece of wire inside the resistor.
Preet kaur: physics report- resistance myp5 ib uploaded by a 20cm wire and a 40cm wire o dependant variable: the variable i choose which is dependent on the independent variable (factor) and the controlled variables the resistance will be the dependent variable in order to take a fair test the thickness of the wire, diameter. A variable resistor that acts as a circuit divider to provide accurate voltage drop reading in response to the movement of an object resistance- the opposition offered by a substance or body to the passage of electric current through it. Wire lengths (independent variable) of 20 cm, 40 cm, 60 cm and 80 cm were used across four different wires (copper, nichrome, aluminium and steel) in recording resistance (dependent variable), due to their prevalence and common use.