UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level *7845774653* 5054/41 PHYSICS Paper 4 Alternative to Practical May/June 2010 1 hour Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a soft pencil for any diagrams‚ graphs or rough working. Do not use staples‚ paper
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Topics in Covered Chapter 6 : Rrfor Series-Parallel 6-1 Finding Resistances Strings Parallel 6-2:Resistance in 6-3:Resistance Banks Series in Banks Strings Series-Parallel 6-4:Resistance and in @2ffi7 The McGrc*Hilt Cwanies Inc. All iskts rcm r.i.:T;11{‚9’.’:;f;.ri;-.:l’::‚t:1+ylid;:l’’fftli. ‚:a::TF.r:.!qt:’ii-.! eil. i:‚:r’.i’tl Tcpfc-s Covered In Chapf‚er 6 a: ::r; i ri:l: li’ ii i:ll ‚i t{ i t ’ ’ ’ j . t. . ’
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Student Exploration Circuits Vocabulary ammeter‚ circuit‚ current‚ electron‚ ohmmeter‚ Ohms law‚ parallel circuit‚ resistance‚ resistor‚ series circuit‚ voltage Prior Knowledge Questions (Do these BEFORE using the Gizmo.) Strings of holiday lights can be designed in one of two ways. In some strings of lights‚ each light is connected to the others along a single wire (in series). In others‚ each light is attached to its own wire (in parallel). Suppose a single light bulb burns out. How do you think
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experiment is to test the predictions for current‚ voltage and resistance of the relationships of parallel and series circuits. The procedures strive to prove that the theoretical outcomes are consistent with the corresponding measured results. After setting up the closed circuits we want to test our own results into the equations and conclude if they are true. In the same circuit‚ there are specific equations that show how current‚ resistance and voltage behave. The equations or predictions differ
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Education Curriculum Technology and Livelihood Education Learning Module ELECTRICAL INSTALLATION AND MAINTENANCE EXPLORATORY COURSE Grades 7 and Grade 8 TABLE OF CONTENTS What Is This Module About ? ................................................................................... 2 How Do You Use This Module ............................................................................... 4 LESSON 1 – Prepare Electrical Supplies‚ Materials and Tools……….5 - 45 LESSON 2 – Perform Mensuration and
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NEW DIGAMBER PUBLIC SCHOOL Session :- 2012-13 subject :- Factors affecting internal resistance of a cell Made by :- Saurabh godha (xii - B) submitted to :- Mr. Harshad shevgaonkar Certificate NAME : Saurabh Godha CLASS : XII - B ROLL NO. : 19 INSTITUTION : New Digamber Public School This is certified to be the bonafide work of the student in the PHYSICS INVESTIGATORY PROJECT during the year 2012 / 2013 . ............................
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accurate graph. Analysis When the bulbs received more current the molecules in the bulb vibrated fast and the bulb became warmer as the resistance increased. As the voltage increased the current and resistance did also. The resistance of the 6V bulb increased as the current and voltage did. However‚ in the pure resistor trial experiment the resistance stayed around the same as the current and voltage increased. The difference between the bulbs and trial experiment graphs are that
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null principle. They give very high degree of accuracy. Bridges Instruments are used to measure • Resistance‚ Inductance‚ Capacitance • Purity of components • Impedances and admittances • Physical parameters Bridge Instruments Types of Bridges • • AC Bridge DC Bridge DC Current Bridge Instruments • Wheatstone bridge and Kelvin Bridge • Used for measurement of resistance • Made sensitive to temperature‚ pressure and light • Complex physical phenomena such as dew point
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more light hitting the LDR and so its resistance decreases and the light turns off. When it is night there is less light so the LDR has higher resistance and the light turns on. Explanation: When light shines on a Light Dependent Resistor‚ electrons are released and the current can get larger. So as the light intensity increases‚ more electrons are released and the resistance decreases. As the light intensity decreases‚ less electrons are released and the resistance increases. 2. Think about the research
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Mechanisms of Silver Nanoparticle Action in Bacteria and Potential for Bacterial Resistance The antimicrobial activity of silver in general‚ and of silver nanoparticles in particular‚ is of significant interest because it appears to be independent of the strain of bacteria. Crucially‚ antibiotic resistant strains‚ MRSA (methicillin‚ or multiple-resistant Staphylococcus aureus)‚ E. coli O157‚ and others are affected by silver [6]. The reasons for this are not fully clear as yet‚ but could be related
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