12.The workdone in moving 500μC charge between two points onequipotential surface is–[J-07, M-08,M-10,J-10,O-11,M-12,J-12]a)zerob) finite +vec) finite–ved) infinite13.When a point charge of 6 μC is moved between two points in anelectric field, workdone is 1.8 x 10-5V. The potential differencebetween the two points is ---(S-09)a) 1.08 Vb) 1.08 μVc)3 Vd) 30 V14.When an electric dipole of dipole moment P is aligned parallel tothe electric field E then the potential energy of the dipole is givenas-------[J-08]a) PEb) zeroc)–PEd) PE /√215.A capacitor of capacitance 6μF is connected to a 100 V battery.The energy stored in the capacitor is ---[M-08]a) 30 Jb) 3 Jc)0.03 Jd) 0.06 J16.The effective capacitance of two capacitors connected in series is1.5μF. If the capacitance of one capacitor is 4μF , then thecapacitance of the other is --- [S-07,09]a)2.4μFb) 0.24μFc) 0.417μFd) 4.17μF17.The capacitance of a parallel plate capacitor increases from 5μF to50 μF when a dielectric is filled between the plates. Thepermittivity of dielectric is ----[J-09]a)8.854 x 10-12C2N-1m-2b) 8.854 x 10-11C2N-1m-2c) 12d) 1018.Three capacitances 1μF, 2μF and 3μF are connected in series.The effective capacitance of the capacitors is -- [M-10]a) 6μFb) 11/6μFc)6/11μFd) 1/6μF19.n capacitors of capacitance C connected in series. The effectivecapacitance is ----[O-11]a)n/Cb)C/nc) nCd) C20.In the given circuit, the effective capacitance between A and B willbe ----- [J-07]a)3μFb) 36/13μFc) 13μFd) 7μFUnit: 2. Current Electricity (20 marks)1 mark→1 Question5 mark→1 Question 52,533 mark →1 Questions 33, 34,35,10 mark→No Ten mark QtnUNIT–2. Current Electricity - 1 mark Questions1.The relation between current and drift velocity is -----[O-10]a) I = nAVd/eb)I = nAVdec) I = neVd/Ad) I = nAVdE2.In case of insulators, as the temperature decreases, resistivitya)increasesb) decreases[DPM,,M-08, M-09]c) becomes zerod) remains constant3.The unit of conductivity is ------[J-07]a) mhob) ohmc) ohm-md)mho-m-14.The transition temperature of mercury is ----[J-09]a) 4.20Cb)4.2 Kc) 2.40Cd) 2.4 KUNIT–2. Current Electricity–1 mark Problems1.If the length of copper wire has certain resistance R, then ondoubling the length its specific resistance ------a) will be doubledb) will be ¼thc) will be four timesd)will remain the same[DMP,S-09,M-10,M-11,O-11]
