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CBSE Class 10th...

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  • Question 1
    1 / -0

    The magnetic field inside the body forms the basis of obtaining the images of different body parts. This is done using a technique called magnetic resonance imaging (MRI). Magnetism has, thus, got important uses in medicine.

    MRI helps in:

  • Question 2
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    The magnetic field inside the body forms the basis of obtaining the images of different body parts. This is done using a technique called magnetic resonance imaging (MRI). Magnetism has, thus, got important uses in medicine

    Magnetic field is a __________ quantity.

  • Question 3
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    Amoeba obtains its food by the process of :

  • Question 4
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    Which juice is secreted by the walls of the small intestine ?

  • Question 5
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    Many optical instruments consist of a number of lenses. They are combined to increase the magnification and sharpness of the image. The net power(P) of the lenses placed in contact is given by the algebraic sum of the individual powers P1,P2,P3..... as :

    P=P1+P2+P3+.......

    Opticians use powers, instead of focal lengths, for prescribing glasses because...

  • Question 6
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    Many optical instruments consist of a number of lenses. They are combined to increase the magnification and sharpness of the image. The net power(P) of the lenses placed in contact is given by the algebraic sum of the individual powers P1,P2,P3.... as:

    P=P1+P2+P3+......

    Lens system (consisting of several lenses in contact) is commonly used in the design of lenses of:

  • Question 7
    1 / -0

    Many optical instruments consist of a number of lenses. They are combined to increase the magnification and sharpness of the image. The net power(P) of the lenses placed in contact is given by the algebraic sum of the individual powers P1,P2,P3..... as:

    P=P1+P2+P3+......

    Lens system increases...

  • Question 8
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    Many optical instruments consist of a number of lenses. They are combined to increase the magnification and sharpness of the image. The net power(P) of the lenses placed in contact is given by the algebraic sum of the individual powers P1,P2,P3..... as :

    P=P1+P2+P3+......

    Power of a concave lens is ?

  • Question 9
    1 / -0

    Many optical instruments consist of a number of lenses. They are combined to increase the magnification and sharpness of the image. The net power(P) of the lenses placed in contact is given by the algebraic sum of the individual powers P1,P2,P3.... as:

    P=P1+P2+P3+......

    A combination of two lenses of power +2.0 D and +0.25 D is equivalent to a single lens of power....

  • Question 10
    1 / -0

    Many optical instruments consist of a number of lenses. They are combined to increase the magnification and sharpness of the image. The net power(P) of the lenses placed in contact is given by the algebraic sum of the individual powers P1,P2,P3...... as:

    P=P1+P2+P3+......

    Lens of power +2.0 D has focal length, equal to:

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