A uniform metallic spherical shell is suspended form celling. It has two holes A and B at top and bottom respectively. Which of the following is/are true :-

An air bubble in a water tank rises from the bottom to the top. Which of the following statements are true?

An air bubble in a water tank rises from the bottom to the top. Which of the following statements are true?

Which of the following orbitals has two spherical nodes?

Which of the following orbitals has two spherical nodes?

Which of the following orbitals has two spherical nodes?

Two half-cells potentials -0.44 and 0.799 volt respectively. These two are coupled to make a galvanic cell. Which of the following will be true ?

A metallic spherical shell has mas m , radius R and Bulk modulus of elasticity B . The change in radius of the shell due to gravitational pressure

A metallic spherical shell has mas m , radius R and Bulk modulus of elasticity B . The change in radius of the shell due to gravitational pressure

A and B are two concentric spherical shells made of conductor. Their radii are R and 2R respectively. The two shells have charge Q and – 2Q on them. An electron escapes from the surface of the inner shell A and moves towards a small hole in the outer shell B. (a) What shall be the minimum kinetic energy of the emitted electron so that it can escape to infinity through the small hole in outer shell? (b) What will be your answer if charge on both the shells were +Q? Charge on electron = e.