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A body revolves with constant speed v in a circular path of radius r . the magnitude of its average acceleration during motion between two points in diametrically opposite direction is:

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A charge q is placed at every corner of a square having side a. how much charge must be placed at its centre to bring the system in equilibrium?

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A charge q is placed at every corner of a square having side a. how much charge must be placed at its centre to bring the system in equilibrium?

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The minimum and maximum distances of a satellite from the centre of the Earth are 2R and 4R respectively, where R is the radius of Earth and M is the Earth. The radius of curvature at the point of minimum distance is

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A charged particle of mass m and charge q is released from rest in an electric field of constant magnitude E. The kinetic energy of the particle after time t is

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The ratio of escape velocity at earth ve to the escape velocity at a planet vp whose radius and mean density are twice as that of earth is:

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when a copper sphere is heated, maximum percentage change will be observed in (1) radius (2) area (3) volume (4) none of these

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In a current carrying load solenoid, the magnetic field produced does not depend upon

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The energy required to break one mole of Cl−Cl bonds in the Cl2 is 242 KJ mol−1 . The longest wavelength of light capable of breaking a single Cl−Cl bond is:

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A uniform sphere of mass 500 g rolls without slipping on a plane surface so that its centre moves at a speed of 0.02 m/s . The total kinetic energy of rolling sphere would be (in J)

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