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GD GOENKA WORLD SCHOOLPhysics Assignment Sheet March 2012

Grade: IX Physics-1 Teachers Name :- Naina VaishDate Assignment Date

DueRemark

2/3Fri Thin converging lensDescription of the action of a thin converging lens on abeam of light using the term principal focus and focallength.Illustration of the formation of a real and virtual image by asingle lens by ray diagrams.Ex. - Q1-3 of Pg.153

5/3Mon

5/3Mon

Illustration of the formation of a real and virtual image by asingle lens by ray diagrams, contd.Description of the use of a single lens as a magnifying glass.Ex. - Q1-3 of Pg.155

6/3Tue

6/3Tue Lab Determination of focal length of convex lens. 9/3Fri9/3Fri

Electromagnetic spectrumDescription of the main features of the electromagneticspectrum, stating that all e.m. waves travel with the samehigh speed i.e. 3X108 m/s in vacuo.Explaining the term monochromatic.Description of the role of electromagnetic waves in: radio and television communications (radiowaves) satellite television and telephones

(microwaves) electrical appliances, remote controllers fortelevisions and intruder alarms (infrared) medicine and security (X-rays)Demonstrate an awareness of safety issues regarding theuse of microwaves and X-raysEx. - Q1-4 of Pg.160 and Q1 & 2 of Pg.165

12/3Mon

12/3Mon

Discussion of Past paper questions. 13/3Tue

13/3Tue

Electrical quantitiesElectric charge

Description of experiments to show the production anddetection of electrostatic charges i.e. positive and negativechargesStating that charge is measured in coulombs; unlikecharges attract and that like charges repelDescription of charging by inductionExplanation of difference between electrical conductors andinsulators using electron model with typical examplesEx. - Q1-6 of Pg.171 and Q1-3 of Pg.173

16/3Fri

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16/3Fri

Electric FieldDescription of an electric field as a region in which anelectric charge experiences a forceExplanation of the lines of force and simple field patterns,including the field around a point charge and the fieldbetween two parallel platesEx. - Q1-4 of Pg.175

19/3Mon

19/3Mon

CurrentDefining current as the rate of flow of charge.Practicing the numerical using the current equation I = Q /tExplanation of the difference between the direction of flowof electrons and conventional currentDescription of the use of an ammeter in a circuit.Ex. - Q1-6 of Pg.177

20/3Tue

20/3Tue

Electro-motive force and Potential differenceDefining e.m.f. in terms of energy supplied by a source indriving charge round a complete circuit and it is measured

in volts.Stating that the potential difference across a circuitcomponent is the energy dissipated per unit charge acrossthe component and it is measured in volts.Description of the use of a voltmeter in a circuit.Ex. - Q1& 2 of Pg.179

23/3Fri

23/3Fri

ResistanceStating that resistance = p.d./current and qualitativeexplanation of how changes in p.d. or resistance affectcurrentSolving numerical using the equation R = V/I

Description of an experiment to determine resistance usinga voltmeter and an ammeterQuantitative explanation of the proportionality betweenresistance and length, and the inverse proportionalitybetween resistance and cross-sectional area of a wireEx. - Q1-3 of Pg.181; Q1-4 of Pg.183 and Q1 & 2 ofPg.185

26/3Mon

26/3Mon

Electrical energyStating the power equation P =IV & energy equation E = IVtSolving numerical using the equations P =IVand E = IVt

27/3Tue

27/3

Tue

Electric circuits

Circuit diagrams Draw and interpret circuit diagrams containing sources,switches, resistors (fixed and variable), lamps, ammeters,voltmeters, magnetising coils, transformers, bells, fuses andrelaysSupplement Draw and interpret circuit diagrams containingdiodes and transistors

30/3

Fri

30/3 4.3 (b) Series and parallel circuits

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Fri Core Understand that the current at every point in a seriescircuit is the same Give the combined resistance of two or more resistors inseries State that, for a parallel circuit, the current from thesource is larger than the current in each branch State that the combined resistance of two resistors inparallel is less than that of either resistor by itself State the advantages of connecting lamps in parallel in alighting circuitSupplement Recall and use the fact that the sum of the p.d.sacross the components in a series circuit is equal tothe total p.d. across the supply Recall and use the fact that the current from thesource is the sum of the currents in the separate

branches of a parallel circuit Calculate the effective resistance of two resistorsin parallel

COMMENTS:____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Parents Signature Teachers Signature