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Physics Test - ...

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  • Question 1
    1 / -0

    A bomber plane is moving horizontally with a speed of 500 m/s and a bomb released from it strikes the ground in 10 seconds. The angle with the horizontal at which the bomb strikes the ground is (g = 10 m/s2)

  • Question 2
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    When a capillary tube of radius r is immersed in a liquid of density p , the liquid rises to a height h in it. If m is the mass of the liquid in the capillary tube, then the potential energy of this mass of the liquid in the tube is

  • Question 3
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    If M0 is the mass of an oxygen isotope 8O17, and Mp and Mn are the masses of a proton and a neutron, respectively, then what is the nuclear binding energy of the isotope ?

  • Question 4
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    A satellite, which is geostationary in a particular orbit, is taken to another orbit. Its distance from the centre of Earth in the new orbit is two times that of the earlier orbit. The time period of the satellite in the second orbit is

  • Question 5
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    The separation between plates is reduced by half and the space between them is of dielectric constant 5 and capacitance 8 pF. Calculate the value of capacitance of parallel plate capacitor when reduced by half.

  • Question 6
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    The figure below shows a network of currents, with the magnitudes of currents shown. The current I will be

  • Question 7
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    You are given 48 cells, each of emf 2 V and internal resistance 1Ω . How will you connect them so that the current through an extemal resistance of 3Ω is the maximum?

  • Question 8
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    A capacitor of capacitance 2 μF is charged to a potential difference of 12 V. The charging battery is then removed and the capacitor is connected across an inductor of self-inductance 0.6 mH. The current in the circuit, at a time when the potential difference across the capacitor is 6 V, is

  • Question 9
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    A chandelier of mass 550 kg is attached to an aluminium rod with an ultimate stress of 1.1 × 108 N/m2. What should be the cross-sectional area of the rod for the safety factor to be 3? Also, find the strain in the rod? Young&aposs modulus of aluminium = 7 × 1010 N/m2.

  • Question 10
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    Monochromatic light is refracted from air into glass of refractive index μ. The ratio of the wavelengths of the incident and refracted waves is

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