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Physics - section - 10

  1. Out of the following pairs, which one does not have identical dimension?

    2. A.
    Moment of inertia and moment of a force
    B.
    Work and Torque
    C.
    Angular momentum and Planck's constant
    D.
    Impulse and Momentum

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  2. Mercury is commonly used as a thermometric fluid rather than water because

    3. A.
    specific heat of mercury is less than water
    B.
    specific heat of mercury is more than water
    C.
    mercury has greater visibility than water
    D.
    density of mercury is more than the water

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  3. Optical fibre works on the

    4. A.
    principle of refraction
    B.
    total internal reflection
    C.
    scattering
    D.
    interference

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  4. Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in

    5. A.
    4.2 seconds
    B.
    42 seconds
    C.
    4.2 years
    D.
    42 years

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  5. Supersonic plane fly with the speed

    6. A.
    less than the speed of sound
    B.
    of sound
    C.
    greater than the speed of sound
    D.
    of light

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  6. Mach number is used in connection with the speed of

    7. A.
    sound
    B.
    aircraft
    C.
    spacecraft
    D.
    ships

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  7. On a stationary sail boat, air is blown from a fan attached to the boat. The boat

    8. A.
    moves in opposite direction in which the air is blown
    B.
    does not move
    C.
    moves in the same direction in which air blows
    D.
    spins around

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  8. Rainbow is due to

    9. A.
    absorption of sunlight in minute water droplets
    B.
    diffusion of sunlight through water droplets
    C.
    ionisation of water deposits
    D.
    refraction and reflection of sunlight by water droplets

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  9. Stars which appear single to the naked eye but are double when seen through a telescope are

    10. A.
    novas and supernovas
    B.
    binaries
    C.
    asteroids
    D.
    quasars

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  10. ML2T-2 is the dimensional formula for

    11. A.
    moment of inertia
    B.
    pressure
    C.
    elasticity
    D.
    couple acting on a body

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