WBJEE- Physics & Chemistry-2011 (Eng)
1. The charge on the capacitor of capacitance C shown in the figure below will be
Subject: Physics & Chemistry
Duration : Two Hours Maximum Marks : 100
Problem 0001
WEST BENGAL JOINT ENTRANCE EXAMINATION,2011
Physics
( English Version )
Multiple Choice Question
1. Experimental investigations show that the intensity of solar radiation is maximum for a wavelength 480 nm in the visible region. Estimate the surface temperature of sun. Given Wein’s constant b = 2.88 × 10–3 mK.
(A) 4000 K (B) 6000 K (C) 8000 K (D) 106 K
Modern Physics : Bohr’s atomic model for hydrogen like atom, hydrogen spectrum, x-ray emission, Moseley’s law, wave particle duality, de Broglie’s hypothesis, photo-electric effect.
Constituents of atoms, isotopes, mass defect, mass-energy equivalence, binding energy. radioactivity - α, β, γ radiation, half life, mean life, fission, fusion.
Energy bands in solids, intrinsic and doped semiconductors, p-n junction diode, rectifier, pnp and npn transistors, common emitter characteristics.
Electromagnetic induction : Magnetic flux, Faraday’s laws of electromagnetic induction, Lenz’s law, self and mutual induction, , Flemings right hand rule, Alternating current, peak and rms value of alternating current; generator, D.C. motor and transformer Qualitativ
Electromagnatism : Magnetic effects of Current, Biot Savart’s law, magnetic field due to an infinite line charge, circular coil and solenoid, Ampere’s circuital law, Lorentz force, Fleming’s left hand rule, force between two current carrying conductors, magnetic moment of a curre
Current Electricity : Electric current, drift velocity and mobility, Ohm’s law, resistivity, combination of resistances in series and parallel, combination of cells.
Kirchoffs laws, Wheatstone bridge, Metre bridge, potentiometer.
