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...Question paper design s no chapter vsa ar sa i ii la total case based mark marks electrostatics current electricity magnetic effects of and magnetism electromagnetic induction alternating waves optics dual nature radiation matter atoms nuclei electronic devices electric charges fields electrostatic potential capacitance moving ray optical instruments wave semiconductor electronics materials simple circuits for latest information please refer to www cbse nic in study passage questions are compulsory attempt any sub parts from each carries syllabus coulomb law conservation states that the force attraction or repulsion acting between charge two stationary point is given by qq f forces r multiple superposition q principle where denotes separated a distance free continuous space e constant known as permittivity vacuum may distribution be taken air practically field if replaced medium then k due dielectric relative lines dipole on which following factors does fk torque proportionality depend...