ASPIRE NEET 2020 : Weekly Test 1

A solid metallic sphere has a charge +3Q. Concentric with this sphere is a conducting spherical shell having charge –Q. The radius of the sphere is a and that of the spherical shell is b (>a). What is the electric field at a distance r (a < r < b) from the centre ?

Four charges are arranged at the corners of a square ABCD, as shown. The force on + ve charge kept at the centre of the square is

Two free positive charges 4q and q are a distance l apart. What charge Q is needed to achieve equilibrium for the entire system and where should it be placed form charge q?

Choose the correct sketch of the magnetic field lines of a circular current loop shown by the dot ⊙ and the cross ⨂ .

Three positive charges of equal value q are placed at vertices of an equilateral triangle. The resulting lines of force should be sketched as in

Which Nitrate is least soluble in aqueous medium?

Which salt is more soluble in aqueous medium?

Amount of energy required to break 1 mole of ionic solid into its gaseous constituent ion is called

Solubility of salt increases if

A salt MX(s), if its dissolution in water is endothermic in nature then,

Consider the diagrams and state the nutritive layer(s) of microsporangium.

Which stage of developing pollen grain shows the presence of callose?

Male gametophyte in angiosperms produces

Which of the following cells are present in mammalian testes and help to nourish sperms

Cowper's gland is present in

Seminiferous tubules are found in