General instructions same as in chapter 1.
Assertion:Rydberg's constant varies with mass number of a given element.
Resaon:The reduced mass of the electron is dependent on a given element.

General instructions same as in chapter 1. Assertion: An atom has equal number of electrons and protons. Reason:In an atom there are equal number of electrons, protons and neutrons.

Given instructions same as in chapter 1. Assertion: Photoelectric effect demonstrates the particles nature of light. Reason:The number of photoelectrons is proportional to the frequency of light.

General instruction same as in chapter 1. Assertion: Electrons move away from a low potential to high potential region. Reason:Because electrons has negative charge.

General instructions same as iin chapter 1. Assertion:A bar magnet exerts a torque on itself due to its own field. Reaons: Magnetic field due to a magnet is uniform.

General instruction same as in chapter 1. Assertion: The electrostatic force between the plates of a charged isolated capacitro increases, when a dielectric fills whole space between the plates. Reason:The electric field between the plates of a charged isolated capacitor increases, when a dielectric fills the whole space between the plates.

Given instructions same as in chapter 1. Assertion:Radio waves can be polarised. Reason:Sound waves in air are longitudinal in nature.

General instructions same as in chapter 1. Assertion:A convex mirror cannot form real images. Reason:Convex mirror converges the parallel rays that are incident on it.

General instructions same as in chapter 1. Assertion:An electron jumps from lower to higher orbit in an atom. Reason:The electron absorbs energy to jump from lower to higher orbit.

General instruction same as in chapter 1. Assertion:In two half life of a radioactive sample, all nuclei will decay. Reason:Half life T=(dN)/(dt) .

Given instructions same as in chapter 1. Assertion: Any substance can be used for the emission of photoelectrons. Reason: Radiations of suitalbe frequency (more than threshold frequency) should be available.