Unit of magnetic dipole moment is a) ampere meter b) ampere/meter⁻¹ c) ampere metre² d) ampere/metre²

What happens if one of the slits, say S1 in Young’s double, slit experiment-is covered with a glass plate which absorbs half the intensity of light from it? (a) The bright fringes become less-bright and the dark fringes have a finite light intensity. (b) The bright fringes become brighter and the dark fringes become darker. (c) The fringe width decreases. (d) No fringes will be observed.

What is the angle between the electric dipole moment and electric field strength due to it on the axial line? (A) \(0^\circ\) (B) \(90^\circ\) (C) \(180^\circ\) (D) None of these

What is the reason for your answer to the above question? (a) The two sources do not emit light of the same wavelength. (b) The two sources emit waves which travel with different speeds. (c) The two sources emit light waves of different amplitudes. (d) There is not constant phase difference between the waves emitted by the two sources.

What is the shape of the magnet in Moving Coil Galvanometer to make the torque maximum? a) Horse Shoe b) Convex c) Concave d) None of these.

Which among the following isn’t a suitable phenomenon to establish that light is wave motion? a) Interference. b) Diffraction. c) Reflection. d) Polarization.

Which of the following is conserved when light waves interference? (a) phase. (b) intensity. (c) amplitude. (d) none of these.

Which of the following is not a property of electric field lines? (A) Field lines are closed and continuous curves without any breaks. (B) Two field lines cannot cross each other. (C) Field lines start at positive charges and end at negative charges. (D) They do not form closed loops.

Which of the following statements is not true about Gauss’s law? (A) Gauss’s law is true for any closed surface. (B) The term q on the right side of Gauss’s law includes the sum of all charges enclosed by the surface. (C) Gauss’s law is not much useful in calculating electrostatic field when the system has some symmetry. (D) Gauss’s law is based on the inverse square dependence on distance contained in the coulomb’s law.