Krishna Deo Pandey , Hindustan Times
New Delhi, February 15, 2011
So, are you are ready for the Board exams? Have you solved the new CBSE physics sample papers? Did you notice the new format of the question paper? If you haven’t, I’ll tell you what it’s all about.New Delhi, February 15, 2011
In the new physics question paper the HOTS (higher order thinking skills) questions have been excluded. There are no other changes in the rest of the paper.
There will be a 15-mark weightage for numericals, adding up to just 15% of the total — that is 10.5 difficult questions. So, this year you will have a fair chance to achieve your set score.
Follow up on these last-minute tips and build on your confidence for the exams:
. Read the questions carefully, not just once but at least twice and underline the catchwords to make sure you have understood the question. Remember, you just have 15 minutes to read the paper. Use that time judiciously.
. Pay attention to the words like AC, DC, resistance, reactance, impedence, conductance, inductance, conductivity, resistivity, potential, potential difference, potential gradient, specific resistance/conductance, electric/magnetic field, galvanometer, ammeter, voltmeter, solenoid/toroid, reflection/refraction, real/virtual, along/across, converging/ diverging, convex/concave, myopia/hyperopia/presbyopia, fringe width/angular width, lens/lens maker’s formula, coherent/incoherent, telescope/microscope, resolving power/limit, polarised/ unpolarised/partially polarised, atomic/mass number, amplifier/rectifier, space/sky wave, fusion/fission, band/bond, finite/infinite, horizontal/vertical etc. These affect the final answer in different ways.
. Before you start writing an answer correctly, mention the question number in the answer sheet.
. While describing any device do mention whether it is a machine, instrument, arrangement or device for a particular purpose. Note that Van de Graaff generator, cyclotron and AC generator are machines, gold-leaf electroscope galvanometer, voltmeter, potentiometer are electrical instruments. Telescope, microscope (reflecting/refracting) are optical instruments and capacitor, meter bridge, transformer, rectifier, amplifier, oscillator are devices for various other purposes.
. Whenever required, give a ‘schematic line diagram’ only if you know enough to label it properly. Avoid 3D and unnecessary shading of diagrams. Use an HB pencil so that you can easily erase and correct it as well as to maintain neatness.
. Always remember to put in arrows correctly while drawing electric/magnetic lines of force, ray diagrams in optics, phasors and electrical circuits.
. Show dotted or full lines for real and virtual images/rays.
. Be careful about the symbols and signs like A: mass number, Z: atomic number, BE: binding energy, L: self inductance, M: mutual inductance etc.
. It’s better to remember and use vector forms of formulae in order to solve problems.
. Do write the relevant formula used as it sometimes carries more weightage than the calculation itself.
. Don’t miss to write correct unit(s) for the physical quantity in the final answer of numericals. There is a penalty for missing/ incorrect units.
. Maintain the small/capital letter sequence correctly while writing SI units. Cm is not the same as cm. The former denotes coulomb metre (electric dipole
moment) the latter is centimeter (non-SI unit for length). Similarly, Nm is not nM or nm.
. In short-answer type questions asking for two features, if you write more than two, the first two options will be evaluated hence always write your best guesses first in case of doubt.
. Never jump/miss steps. There are marks for steps.
. If you have reattempted or attempted an extra question do not forget to cancel the one you think is not satisfactory otherwise the question attempted first will be evaluated and you will lose marks.
. Save at least 15 minutes for revision and necessary corrections.
Write correct, write to the point, write smart and be a winner. All the best.
The writer is PGT (physics) and can be contacted at krishnaheart@rediffmail.com
Follow up on these last-minute tips and build on your confidence for the exams:
. Read the questions carefully, not just once but at least twice and underline the catchwords to make sure you have understood the question. Remember, you just have 15 minutes to read the paper. Use that time judiciously.
. Pay attention to the words like AC, DC, resistance, reactance, impedence, conductance, inductance, conductivity, resistivity, potential, potential difference, potential gradient, specific resistance/conductance, electric/magnetic field, galvanometer, ammeter, voltmeter, solenoid/toroid, reflection/refraction, real/virtual, along/across, converging/ diverging, convex/concave, myopia/hyperopia/presbyopia, fringe width/angular width, lens/lens maker’s formula, coherent/incoherent, telescope/microscope, resolving power/limit, polarised/ unpolarised/partially polarised, atomic/mass number, amplifier/rectifier, space/sky wave, fusion/fission, band/bond, finite/infinite, horizontal/vertical etc. These affect the final answer in different ways.
. Before you start writing an answer correctly, mention the question number in the answer sheet.
. While describing any device do mention whether it is a machine, instrument, arrangement or device for a particular purpose. Note that Van de Graaff generator, cyclotron and AC generator are machines, gold-leaf electroscope galvanometer, voltmeter, potentiometer are electrical instruments. Telescope, microscope (reflecting/refracting) are optical instruments and capacitor, meter bridge, transformer, rectifier, amplifier, oscillator are devices for various other purposes.
. Whenever required, give a ‘schematic line diagram’ only if you know enough to label it properly. Avoid 3D and unnecessary shading of diagrams. Use an HB pencil so that you can easily erase and correct it as well as to maintain neatness.
. Always remember to put in arrows correctly while drawing electric/magnetic lines of force, ray diagrams in optics, phasors and electrical circuits.
. Show dotted or full lines for real and virtual images/rays.
. Be careful about the symbols and signs like A: mass number, Z: atomic number, BE: binding energy, L: self inductance, M: mutual inductance etc.
. It’s better to remember and use vector forms of formulae in order to solve problems.
. Do write the relevant formula used as it sometimes carries more weightage than the calculation itself.
. Don’t miss to write correct unit(s) for the physical quantity in the final answer of numericals. There is a penalty for missing/ incorrect units.
. Maintain the small/capital letter sequence correctly while writing SI units. Cm is not the same as cm. The former denotes coulomb metre (electric dipole
moment) the latter is centimeter (non-SI unit for length). Similarly, Nm is not nM or nm.
. In short-answer type questions asking for two features, if you write more than two, the first two options will be evaluated hence always write your best guesses first in case of doubt.
. Never jump/miss steps. There are marks for steps.
. If you have reattempted or attempted an extra question do not forget to cancel the one you think is not satisfactory otherwise the question attempted first will be evaluated and you will lose marks.
. Save at least 15 minutes for revision and necessary corrections.
Write correct, write to the point, write smart and be a winner. All the best.
The writer is PGT (physics) and can be contacted at krishnaheart@rediffmail.com
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