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Physics Test-40...

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  • Question 1
    4 / -1

    Unit of surface tension is:

  • Question 2
    4 / -1

    Joining of light nuclei of elements to form a heavy nucleus with the release of energy is called as

  • Question 3
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    Stefan Boltzmann law is applicable for heat transfer by __________.

  • Question 4
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    The current sensitivity of a moving coil galvanometer increases by 20% when its resistance increases by a factor 2 while keeping the number of turns constant. The voltage sensitivity changes by _________increases/decreases.

  • Question 5
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    The formula for the centre of mass of a two-particle system is?

  • Question 6
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    Why can insects move on the surface of water without sinking?

  • Question 7
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    Two long solenoids \(\mathrm{S}_{1}\) and \(\mathrm{S}_{2}\) have equal lengths and the solenoid \(\mathrm{S}_{1}\) is placed co-axially inside the solenoid \(\mathrm{S}_{2}\). If the radius of the inner solenoid is halved, then the mutual inductance of both the solenoids will become:

  • Question 8
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    What type of material is obtained when an intrinsic semiconductor is doped with trivalent impurity?

  • Question 9
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    A car is moving with a constant speed of 10 ms-1 along a circular path of radius of 10 m in a horizontal plane. A plumb is suspended from the roof of the car by a light rigid rod.  The angle subtended by the rod from the path is:

  • Question 10
    4 / -1

    The core of a transformer is laminated to reduce energy losses due to:

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