Electrical resistance

Practical Investigation Outline -Alana Hughes Title: Resistance of pencil lines Aim: To investigate if the type of grey lead pencil affects the resistance of the flow of electricity. Hypothesis: If different types of lead pencils are tested to find the electrical resistance, the B pencils will then have less resistance because there is more electricity conducting material in the lead. Introduction: Resistance occurs when atoms find it difficult to travel along wire because there is a restriction

Batteries, Resistance and Current Introduction: Voltage can be thought of as the pressure pushing charges along a conductor, while the electrical resistance of a conductor is a measure of how difficult it is to push the charges along. Using the flow analogy, electrical resistance is similar to friction. For water flowing through a pipe, a long narrow pipe provides more resistance to the flow than does a short fat pipe. The same applies for flowing currents: long thin wires provide more resistance than

between the diseases because morphological differences between normal and malignant prostate tissue are present and sensitivity of electrical im-pedance spectra to cellular structure was known. Bio-impedance is one of the properties referred to a tissue’s re-sistance when electrical current flows in the tissue. It also means the ability of tissue to store electrical charges. Bio-impedance normally depends on spacing of cells, cellular density and size, and the components of the extracellular ma-trix

circuits; relating resistance, voltage, and amperage together. In this lab, we created various configurations of circuits as well as adjusted said circuits current to get a hands-on realistic understanding of Ohm’s law and its implications. This also expanded our understanding of how properties of a resistor can change under different conditions: such as a bulb having a changing resistance based on temperature. Theory: Electrical charge always wants to flow from a high electrical potential to a low

bearings in 1951 with another name Nippon Miniature Bearing Co., Ltd. The growth and development of this company was succeeded by merging. This evolve the company into a precision manufacturer for rotating device, electronic equipment, and other electrical and electronic-related products account for over half of overall sales. A strain-detection instruments manufacturer named Shinko Communication Industry Co., Ltd., merged with Minebea by absorption in 1981. It contributes the patent body of the precision

Resistance in a Wire Coursework In this investigation we are trying to look for resistance in a piece of wire, and how the length of a wire can increase or decrease the resistance. The things that affect the resistance in a wire are: • the length of the wire • a certain amount of wire • cross sectional area of the wire (thickness) • temperature • material What things can affect the resistance in a wire? The temperature can affect the resistance in a wire, because the more thermal

important electrical properties namely: voltage, current and resistance. Mathematically, ohm’s law is expressed as: V=IR. By understanding the importance of conduction, one is able to determine the total resistance and visualize how resistors are connected in parallel circuits. In parallel connection, each resistor provides a separate path for current [I] so that the total resistance of a parallel circuit is reduced as more resistors are connected in parallel. In contrast, the resistance in series

All the data was fitted satisfactorily using the equivalent circuit shown in Fig. 7. Where, Rs, CPE1 and R1 represent solution resistance, a constant- phase element corresponding to the double layer capacitance and the charge transfer resistance, respectively. CPE2 and R2 were added to account for the electrical elements of the outer layer. The following formula expressed the electrode impedance, Z, as follow: Z = Rs + [Rct/ {1 +(2 π f Rct Cdl)α }] (8) Where α is an empirical

Due date: March, 13 20144 Group Names: Hisham Sageer Objectives: Our object is to confirm Ohm’s law by analyzing the dependence of the electrical current as a function of voltage and as a function of resistance. Also, we studied the current flow and voltage in series and parallel. Finally, the lab determined the equivalence resistance of series and parallel combination of resistors and compared the results with theoretical data. Theoretical Background: The first thing that needs

Microcontroller (ATMEGA328): The ATMEL, ATMEGA328 is a is a low-power CMOS 8-bit microcontroller based on the AVR enhanced architecture. By executing powerful instructions in a single clock cycle, the ATmega328 achieves throughputs close to 1MIPS per MHz. This empowers system designer to optimize the device for power consumption versus processing speed. The ATMEL AVR core combines a rich instruction set with 32 general purpose working registers. All the32 registers are directly connected to the Arithmetic