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PGT PHYSICS

Studied SYSTEM ENGG. at M. TECH. - DEI - AGRA
PGT - PHYSICS at CBSE - SCHOOL - AGRA
Live in Agra,India, Uttar Pradesh
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Mentoring and teaching students of class – X, XI and XII [Science stream] acad...
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26 May 2020 12:37 AM study24x7 study24x7

Following quantities are neither vectors nor scalars : Relative density, density, viscosity, frequency, pressure, stress, strain, modulus of elasticity, poisson’s ratio, moment of inertia, specific heat, latent heat, spring constant loudness, resistance, conductance, reactance, impedance, permittivity, dielectric constant, permeability, susceptibility, refractive index, focal length, power of lens, Boltzman constant, Stefan’s constant, Gas constant, Gravitational constant, Rydberg constant, Planck’s constant etc.

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26 May 2020 12:36 AM study24x7 study24x7

A quantity having magnitude and direction is not necessarily a vector. For example, time and electric current. These quantities have magnitude and direction but they are scalar. This is because they do not obey the laws of vector addition.


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  • Shahbaz Shahbaz
  • Hello Sir I guess vector law of algebra is more appropriate.
    26 May 2020 12:33 AM study24x7 study24x7

    Light year is a unit of :-

    A

    Time

    B

    Mass

    C

    Distance

    D

    Energy

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    26 May 2020 12:29 AM study24x7 study24x7

    A hall has the dimensions 10m x 12m x 14 m. A fly starting at one corner ends up at a diametrically opposite corner. What is the magnitude of its displacement

    A

    17 M

    B

    26 M

    C

    36 M

    D

    21 M

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    25 May 2020 10:22 PM study24x7 study24x7

    General Introduction to Physics - For class IX - ICSE - Board students Only.1. Examination Pattern.
    2. Detailed Syllabus
    3. Practical Assessment.

    General Introduction-PDF.pdf
    1 Downloads
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  • good
    25 May 2020 10:11 PM study24x7 study24x7

    What should be the aim behind study of Physics. ?

    [a] To acquire knowledge and understanding of the terms, facts, concepts, definitions, laws, principles and processes of Physics.

    [b] To develop skills in practical aspects of handling apparatus, recording observations and in drawing diagrams, graphs, etc.

    [c] To develop instrumental, communication, deductive and numerical problem - solving skills.

    [d] To discover that there is a living and growing physics relevant to the modern age in which we live.

    ***.Please do not remember the physics always try to understand it.

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    25 May 2020 09:57 PM study24x7 study24x7

    In olden days, electricity and magnetism were treated as separate subjects. Electricity dealt with charges on glass rods, cat’s fur, batteries, lightning, etc., while magnetism described interactions of magnets, iron filings, compass needles, etc. In 1820 Danish scientist Oersted found that a compass needle is deflected by passing an electric current through a wire placed near the needle.

    Ampere and Faraday supported this observation by saying that electric charges in motion produce magnetic fields and moving magnets generate electricity. The unification was achieved when the Scottish physicist Maxwell and the Dutch physicist Lorentz put forward a theory where they showed the interdependence of these two subjects. This field is called electromagnetism.


    Most of the phenomena occurring around us can be described under electro -magnetism. Virtually every force that we can think of like friction, chemical force between atoms holding the matter together, and even the forces describing processes occurring in cells of living organisms, have its origin in electromagnetic force. Electromagnetic force is one of the fundamental forces of nature.

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    19 May 2020 06:30 PM study24x7 study24x7

    Two cells of equal e.m.f. and of internal resistances R1 and R2 { R2 > R1} are connected in series. On connecting this combination to an external resistance R, it is observed that the potential difference across the first cell becomes zero. The value of R will be

    A

    R1 + R2

    B

    R1 - R2

    C

    (R1 + R2)/2

    D

    (R1 - R2)/2

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    19 May 2020 06:16 PM study24x7 study24x7

    If a 0.1 % increase in length due to stretching, the percentage increase in its resistance will be

    A

    0.2%

    B

    2%

    C

    1%

    D

    0.1%

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    19 May 2020 05:27 PM study24x7 study24x7

    PLEASE NOTE :-
    Today at 20:00 hrs I am going to deliver a on-line free webinar on physics topic " Projectile Motion " at all india level for students of K-11, K-12 , K-13, NEET, JEE and NEST aspirants on zoom app. Interested students may send their request to on mobile no. 9557426981 [whatsapp] & 7906734148 for getting ID and passoword upto 19:30 hrs today evening.

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