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What has the author William R Eberle written?
William R. Eberle has written: 'The effects of water content and water resistivity on the dispersion of resistivity and dielectric constant in quartz sand in the frequency range 10' -- subject(s): Soil moisture, Electric resistance
What Effect does battery capacity on a circuits internal resistance?
Batteries are rated as ampere/hour any circuit that draws power from it effects it. The lower the internal resistance of the circuit the shorter the useful battery life as discharged.
What is the effect of draught in a simple pendulum experiment?
In a simple pendulum experiment, air resistance or drag can affect the motion of the pendulum by slowing it down. This can lead to discrepancies in the period and amplitude of the pendulum swing compared to theoretical calculations. It is important to minimize the effects of air resistance in order to obtain accurate results in the experiment.
What kind of connecting wire should be used in physics Lab thinner or thicker?
If the electrical characteristics of the wire itself are not part of the experiment, then the wire should be thick and short. This minimizes both the resistance and inductance of the wire, and therefore the chances that the effects of the wire could influence the observations of the experiment.
Resistivity of copper at 20 degree celsius?
Resistivity allows us to compare different conductors' abilities to transmit electric current that is independent of the physical dimensions of the conductors.Resistivity is defined as 'the resistance of a unit length of a substance with a uniform cross-section'. In SI, the unit of measurement of resistivity is the ohm metre; in US customary units, it is expressed in ohm circular mil per foot.So, to finally answer your question, the resistivity of copper is 17.5x10-9 ohm metres at 20oC. To find the resistance of a copper conductor, you can then use the equation:resistance = resistivity x (area / length)Additional AnswerThe resistivity of copper depends on the temperature it which it is measured. At 25°C, it is about 17 nΩ.m, or 1.7 µΩ.cm.The resistance of a conductor is then p * L / A, where p is the above number.So for a wire with a length of 1 m (i.e. 100 cm), and a cross sectional area of 2 cm², the resistance is 17e-6 * 100 / 2 = 85 µΩ
What is the definition of controled experiment?
the definition for a controlled experiment is it test the effects of one factor
How do you reduce resistivity of a wire length and diameter should be equal or length should be halve or both should be halved or length should b doubled and diameter should be halved or diameter doub?
'Resistivity' is usually considered to be a property of a substance, not a structure.In the normal unit of resistivity, the length and cross-section area are divided out,so they don't affect the 'resistivity.In the case of your piece of wire, the only characteristic that it seems reasonableto discuss is just plain good old 'resistance'.I think the point of this question is to investigate the relative effects ... of a changein length compared to the same change in diameter ... on the initial resistance of apiece of wire.Length:The resistance of the sample is directly proportional to its length.Diameter:The resistance of the sample is inversely proportional to the cross-sectional area,which is the same as saying 'inversely proportional to the square of the diameter'.So, let's look at the choices listed in the question:Change length to 1/2:Resistance changes to 1/2 .Change length and diameter both to1/2 :Resistance changes by factor of 1/2 x 4 = 2Length doubles, diameter 1/2:Resistance changes by factor of 2 x 4 = 8 timesLength doubled, diameter doubled:Resistance changes by factor of 2 x 1/4 = 1/2The first and last choices both reduce the resistance.The others both increase the resistance.
A scientist conducts a experiment to test the effects of the light on earthworm activity What is the variable in this experiment?
temputure
How do you know that a variable is really a control variable and what is the property of control variables?
If you're performing an experiment in which your result depends on multiple variables, but you're just interested in how one of those variables effects the result, you would generally keep all of the other variables constant in order to negate their effects. Those variables that you're keeping constant are called control variables, and you would choose them based on the experiment. For example, say you wanted to determine how changes in resistance effect a circuit's current. Well, current is dependent on not only resistance, but voltage as well, and since you're only interested in the effects of resistance, you would make voltage the control variable, keeping it constant.
What is the single factor that is changed in an experiment?
the independent variable is the factor of an experiment that is altered in an attempt to understand its effects on the experiment's subject
How many variables are generally tested in an experiment?
The trick to designing a good experiment is to figure out a way for it to test the effects of only one variable, and to avoid any effects of others.
What is friction and what effects does it have on motion?
Friction is the sum of resistance to motion and as for resistance, it slow down the motion.
