A solid sphere, a hollow sphere and a disc, all having same mass and radius, are placed at the top of an incline and released. The friction coefficients between the objects and the incline are same and not sufficient to allow pure rolling. Least time will be taken in reaching the bottom by

The relative charges of electron, proton, and neutron respectively are:&nbsp;

Specific charge of anode rays is highest for

Which of the following statements about the electron is incorrect?

The nucleus was discovered by James Chadwick in an experiment involving the bombardment of the nucleus of which atom with α-particles?&nbsp;

Three invisible radiations X, Y and Z are  passed through an electric field. X goes straight, Y deviates towards the  positive end while Z deviates towards the negative end. The particles present  in X, Y and Z and the e/m ratio for X are

A solid sphere, a hollow sphere and a disc, all having same mass and radius, are placed at the top of an incline and released. The friction coefficients between the objects and the incline are same and not sufficient to allow pure rolling. Least time will be taken in reaching the bottom by

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