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Physics Test 14...

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  • Question 1
    4 / -1

    A 3 kg block rests on a 2 kg block on a spring of spring constant 50 N/m as shown in figure. The upper block is suddenly removed. During the subsequent motion of block of mass 2 kg, select the correct statement(s) : (g = 10 m/s2)

  • Question 2
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    A particle  of mass m is performing SHM with amplitude A. When the particle is at mean position, a block of same mass was kept on it such that is sticks to it. Mark the correct option(s) :

  • Question 3
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    The springs are identical and initially relaxed. The block is pushed to left by distance x and released.

  • Question 4
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    A nucleus has a radius of 7.2 × 10–15 m. When an α-decay takes place from this nucleus, ratio of number of neutrons and number of protons in the daughter nucleus becomes 65/41 :-

  • Question 5
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    An X-ray tube is operating at 50kV and 20mA. The target material of the tube has a mass of 1kg and specific heat 495J/kg°C. One percent of the supplied electric power is converted into X-rays and the entire remaining energy goes into heating the target. Then

  • Question 6
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    Two particle A and B executing SHM along same straight line with same amplitude and same mean position. A starts its motion form mean position and moves towards positive extreme while B starts from negative extreme position. Angular frequency of A is ωA and that of B is ωB choose the correct statement.

  • Question 7
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    Directions For Questions

    A particle of mass m is connected from the origin O of an inertial frame with the help of an elastic cord of force constant k and negligible relaxed length. In addition to the elastic force of the cord, a constant force  also acts on the particle. The particle is pulled to an arbitrary position (x0, y0) as shown in the figure and released. 

    ...view full instructions

    The position(s) at which the velocity of particle is zero, is/are :

  • Question 8
    4 / -1

    Directions For Questions

    A particle of mass m is connected from the origin O of an inertial frame with the help of an elastic cord of force constant k and negligible relaxed length. In addition to the elastic force of the cord, a constant force  also acts on the particle. The particle is pulled to an arbitrary position (x0, y0) as shown in the figure and released. 

    ...view full instructions

    Choose the CORRECT statement(s) :

  • Question 9
    4 / -1

    Directions For Questions

    A monochromatic point source S radiating wavelength 6000 Å, with power 2 W. An aperture A of diameter 0.1 m and a large screen SC are placed as shown in figure. A photoemissive detector D of surface area 0.5 cm2 is placed at the centre of the screen. The efficiency of the detector for the photoelectron generation per incident photon is 0.9. A concave lens L of focal length 0.6 m is inserted in the aperture as shown. Assume 100 % transmission from the lens.

    ...view full instructions

    Choose the correct statement(s)

  • Question 10
    4 / -1

    Directions For Questions

    A monochromatic point source S radiating wavelength 6000 Å, with power 2 W. An aperture A of diameter 0.1 m and a large screen SC are placed as shown in figure. A photoemissive detector D of surface area 0.5 cm2 is placed at the centre of the screen. The efficiency of the detector for the photoelectron generation per incident photon is 0.9. A concave lens L of focal length 0.6 m is inserted in the aperture as shown. Assume 100 % transmission from the lens.

    ...view full instructions

    Choose the correct statement(s)

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