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1 150 MOST IMPORTANT QUESTIONS IN PHYSICS FOR CLASS 12 BOARD EXAMS E R . V INEET P REPARED BY : L OOMBA (B.T ECH . IIT R OORKEE ) UNIT 1 Electrostatics 1. 2. 3. 4. Derive an expression for the electric field at a point on the axial position of an electric dipole. Describe the Principle, construction and working of Van de Graff generator. Derive an expression for the energy stored in a capacitor. Show that whenever two conductors share charges by bringing them into electrical contact, there is a loss of e