circuit diagrams. 2. Write the formulae to calculate the effective resistances when resistors are connected (a) in series and (b) in parallel. 3. How is the total potential difference calculated across a combination of resistors in series? 4. Example 12.7 An electric lamp‚ whose resistance is 20 Ω‚ and a conductor of 4 Ω resistance are connected to a 6 V battery (Fig. 12.9). Calculate (a) the total resistance of the circuit‚ (b) the current through the circuit‚ and (c) the potential
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lab was to be able to draw completed electrical circuits using the correct symbols for selected electrical components‚ including batteries and diodes. Another focus was to calculate the proper resistance using Ohm’s law‚ use proper electrical currents and quantities‚ and lastly measure voltage and resistance in an electrical circuit using a multimeter. Materials: Wire Light Emitting Diodes (red‚ green‚ blue) Alligator Chips Resistors Multimeter 9-volt battery Procedures: 1. With the
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understanding different illness‚ and issues that arise in the medical field. More specifically‚ the cooperation of evolutionary biology with modern medicine has helped with understanding antibiotic resistance and susceptibility‚ spread of disease‚ and development of cancer. I will be discussing the antibiotic resistance and susceptibility of E. Coli Biofilms‚ the spread of Tuberculosis‚ and the changes in breast cancer cell DNA. These different examples are going to prove how evolution has affected medicine
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bacteria is evolving rapidly and resisting antibiotics due to the overuse of the medicine‚ reducing the need and use would help slow down the bacteria from evolving. There are many things that can be done to help slow down the resistance of antibiotics. If the trend of this resistance keeps growing antibiotics wont be able to help the human body from a bacterial infection. For over 70 years antibiotics have been used to treat people with infectious diseases. Penicillin was the first type of antibiotic
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Aim: To find resistance of a given wire using metre bridge and hence determine the specific resistance of its material. Apparatus: A meter bridge ‚a Leclanche cell ‚ a galvanometer ‚a resistance box‚ a jockey‚ a resistance wire or resistance coil‚ a metre scale‚ a set square and connecting wires Procedure: 1.Draw the circuit diagram as shown in figure and arrange the apparatus according to the arrangement diagram. 2. Connect the resistance wire or resistance coil whose resistance is to be determined
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resistive devices typically fabricated by laying a strip of resistive ink on a flexible plastic substrate‚ shaped as a thin‚ flexible stripe in lengths between 1” and 5”. At rest (when laid flat)‚ the bend sensor is characterized by an intrinsic resistance. As the sensor is bent‚ the resistive materials inside it are pulled further apart. Fewer adjacent resistive particles
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Conclusions of DH5α DNA transformation with red colonies resistance to ampicillin and the lacZ gene Introduction: In this experiment‚ a plasmid with a gene that has resistance to the antibiotic ampicillin and has lacZ is used to transfer the resistance into E. coli bacteria in red colonies. This same technique is used to give diabetics their insulin‚ and to give dwarfs growth hormones. The point of this lab is to give the groups an idea how DNA can
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is a Gram-positive bacterium that developed resistance to the penicillin derivative tnethicillin. Subsequently‚ methicillin-resistant S. aureus {MRSA) emerged as a bacterium that became less susceptible to the actions of methicillin and thus developed the ability to colonize and cause life-threatening infections. Globally.‚ MRSA continues to cause hospital-acquired infections which are becoming difficult to treat owing to increasing glycopeptide resistance and the increasing development of community-associated
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percentage the resistor is to its ohm value. This is important for two reasons: the nature of its construction is imprecise‚ and if used above its maximum current‚ the value can change or the unit itself can burn up. • RESISTANCE In physics‚ resistance is defined as the ability of a substance to prevent or resist the flow of electrical current. A substance resists electrical current because of a collision between electrons and atoms‚ which slows the electrons down and converts
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determine the resistance of a resistor using various methods and to also verify Ohm’s Law. In the lab‚ the students were instructed to calculate the resistance by using color codes‚ measuring the resistance using a Digital Multi Meter‚ calculate the average resistance from 10 voltage and current measurements‚ and find the graphical resistance using a trend line. The results show that the average resistance calculated from 10 voltage and current readings and the graphical resistance were closest to
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