Phy-Section AThis section contains 35 SINGLE CORRECT TYPE questions. Each question has 4 choices (1), (2), (3) and (4), out of which only one is correct.Total charge of 1 μC is non-uniformly distributed on a ring of radius 2 m, the potential at the centre of the ring is9 × 103 V5 × 10–3 V4.5 × 103 VZero

Total charge of 1 μC is non-uniformly distributed on a ring of radius 2 m, the potential at the centre of the ring is

A semicircular ring of radius 0.5 m is uniformly charged with a total charge of 1.4 ´ 10–9 C. The electric field intensity at the centre of this ring is :–

A 0.3 uC of source charge is placed in the electric field. Calculate it’s electric potential at a distance 5 cm away from a test charge.Group of answer choices54x10^-3 J/C54000 J10.8x10^7 J54x10^3 J/C

5. Unless otherwisenoted, a compound shouldhave an overall charge of___

1 For coulomb force to be operative the least size of the atom will be a) 10ି଼ m b) 10ିଵହ m c) 10ିଵ଴ m d) 10ିଵଶ m 2 A conducting sphere of radius 10 cm is charged with 10 μC. Another uncharged sphere of radius 20 cm is allowed to touch it for some time. After that if the spheres are separated, then surface density of charges on the spheres will be in the ratio of a) 1: 1 b) 2: 1 c) 1: 3 d) 1: 2 3 When 10ଵଽ electrons are removed from a neutral metal plate, the electric charge on it is a) - 1.6 C b) 10ାଵଽ C c) +1.6 C d) 10ିଵଽ C 4 A charge q is placed at the center of the line joining two equal charges Q. The system of the three charges will be in equilibrium if q is equal to a) ொ ହ b) ொ ଶ c) ொ ସ d) ିொ ସ 5 A parallel plate air capacitor is charged to a potential difference of V volt. After disconnecting the charging battery, the distance between the plates of the capacitor is increased using an insulating handle. As a result, the potential difference between the plates. a) does not change b) increases c) becomes zero d) decreases 6 Which of the following is not the property of equipotential surfaces? a) They are concentric spheres for uniform electric fields. b) They can be imaginary spheres. c) They do not cross each other. d) Rate of change of potential with distance on them is zero.