up our experiment. Some of the problems leading the experiment to not work were to make double wires in to single wires. This caused us to waste a lot of one’s time and get the wires tangled up. We didn’t have ladder to put up the wires and the insulators very high. During the first experiment (which did not work) the kohm resistor and the germanium diode were backwards. Also the earphone during experiment two were misplaced. During experiment one‚ one connected the antenna to the ground when one
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of K is 8.98755 x 109 Nm2c-2. OTHER FORMS OF COULOMB’S LAW Putting the value of K = 1/40 in equation (i) FORCE IN THE PRESENCE OF DIELECTRIC MEDIUM If the space between the charges is filled with a non conducting medium or an insulator called "dielectric"‚ it is found that the dielectric reduces the electrostatic force as compared to free space by a factor (r) called DIELECTRIC CONSTANT. It is denoted by r . This factor is also known as RELATIVE PERMITTIVITY. It has different
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Gallium Gallium was discovered through a spectroscope by a French chemist named Paul Emile Lecoq de Boisbaudran in 1875. The name Gallium comes from the Latin word‚ Gallia‚ which means France. It is also possible that he named it after himself because Lecoq means the rooster in French and the Latin word for rooster is “gallus” but he denied that claim. Gallium is a silvery blue metal with a unique characteristic. It has a melting point of only 85.6 degrees Fahrenheit so it will actually melt
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10 seconds. How many electrons were involved? 3.12 x 1017 8. A battery has a rating of 1500 mA-Hr. The battery supplies 75 mA to an electric circuit. How long will the battery last? 20 Hr 9. Semiconductors exhibit characteristics of a. insulators b. conductors c. both a and b 10. True / False a. A voltmeter must be connected across a component to make a proper measurement. T b. An ammeter must be connected in series with a component to make a proper measurement.
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1. How is electricity produced? The most simple way of producing static ekectricity is by rubbing or friction. When you rub two different kind of materials that are insulator‚ you can transfer electrons from one substance to another. Nowadays‚ to create electricity we use battery and generators. Voltage can be made by heart‚ light or mechanical pressure. http://science.howstuffworks.com/electricity-info2.htm 2. Where and how is electricity used? Electricity gives us ability to produce
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investigation of the dielectric charging and discharging process in silicon nitride thin films for RF-MEMS capacitive switches. The SiN films were deposited with high frequency (HF) and low frequency (LF) PECVD method and with different thicknesses. Metal–Insulator–Metal capacitors have been chosen as test structures while the Charge/Discharge Current Transient method has been used to monitor the current transients. The investigation reveals that in LF material the stored charge increases with the film thickness
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on a layer of rubbery polyester engineered to have mechanical properties well matched to those of natural skin. The new electrode is safe for patients’ with sensitive skin. The middle layer of the device is made of the metal‚ semiconductor‚ and insulator components needed for sensors‚ electronics‚ and power supply. The design has all of the necessary components‚ in an ultra-thin layer. The device could also potentially be used as an electronic bandage. The “temporary tattoo” can be used to speed
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until it reaches the 0.0cm3 mark. e)The risk of using plastic cup in this experiment is that the plastic material is too thin which will cause the outside surface of the plastic cup to be hot due to conduction. Furthermore‚ plastic is not a good insulator as compared to polystyrene cup and this will cause heat loss which will affect the reading of the experiment ii)NaOH is a strong alkaline solution that can cause severe chemical burns if it is in contact with skin f)i) Since the paper coffee cup
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poor conductor of electricity. If the electrons in an atom can’t be moved from their orbits at all‚ the material is an insulator. If at least some of the electrons can be moved‚ the material is a resistor. Two of the best-known conductors of electricity are silver and copper. The atomic structures of the silver and copper atom are compared in Figure 6. Note that both atoms have only one electron in the outermost orbit. This makes silver and copper excellent conductors of electricity. Silver
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a mixture of sand and salt. Materials: Small beaker Electric balance Sand Salt Water Graduated cylinder Stirring rod Filter paper Flask Rubber policeman Wash bottle Funnel Bunsen burner complete with rubber tubing and a source of gas Hot hands Insulator pad Ring stand complete with a ring Wire gauze Striker Pre-lab Questions: 1. Water will be useful in separating the salt and sand because salt is soluble in water‚ which allows it to dissolve into a homogenous mixture‚ allowing for filtering of
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