Magnetism and Matter Objective Question and Answer
Magnetism and Matter MCQ Multiple Choice Questions - Page 2 for Practice
Magnetism and Matter MCQ Questions for Practice
31. Let the magnetic field on earth be modelled by that of a point magnetic dipole at the centre of earth. The angle of dip at a point on the geographical equator is
Correct Answer is: always negative
32. Let the magnetic field on earth be modelled by that of a point magnetic dipole at the centre of earth. The angle of dip at a point on the geographical equator
Correct Answer is: is not bounded.
33. In a moving coil galvanometer, we use a radial magnetic field so that the galvanometer scale is :
Correct Answer is: logarithmic
34. In a bar magnet, magnetic lines of force z :
Correct Answer is: run continuously through the bar and outside
35. Ferrites may be:
Correct Answer is: None of the above
36. Curie temperature is the temperature above which
Correct Answer is: a paramagnetic material becomes ferromagnetic.
37. Curie law xT = constant, relating magnetic susceptibility (x) and absolute temperature (T) of magnetic substance is obeyed by
Correct Answer is: ferromagnetic substances.
38. At a given place on earth's surface the horizontal component of earth's magnetic field is 2 × 103-5 T and resultant magnetic field is 4 × 103-5 T. The angle of dip at this place is
Correct Answer is: 45o
39. A wire of length I has a magnetic moment M. It is then bent into a semi-circular arc. The new magnetic moment is :
Correct Answer is: Mπ
40. A magnetic needle is kept in a non-uniform magnetic field. It experiences
Correct Answer is: a force but not a torque.
41. A magnetic dipole moment is a vector quantity directed from:
Correct Answer is: W to E
42. A current carrying power line carries current from west to east. What will be direction of magnetic field 1 meter above it?
