41. The magnetic materials exhibit the property of magnetisation because of A. orbital motion of electrons B. spin of electrons C. spin of nucleus D. either of these Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
42. A rectangular magnet of magnetic moment M is cut into two piece of same length, the magnetic moment of each piece will be A. M B. $$\frac{{\text{M}}}{2}$$ C. 2 M D. $$\frac{{\text{M}}}{4}$$ Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
43. Main causes of noisy solenoid are A. strong tendency of fan out of laminations at the end caused by repulsion among magnetic lines of force B. uneven bearing surface, caused by dirt or uneven wear between moving and stationary parts C. both of above D. none of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
44. The most effective and quickest may of making a magnet from soft iron is by A. placing it inside a coil carrying current B. induction C. the use of permanent magnet D. rubbing with another magnet Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
45. Gilbert is a unit of A. electromotive force B. magnetomotive force C. conductance D. permittivity Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
46. Which of the following is the unit of magnetic flux density? A. Weber B. Lumens C. Tesla D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
47. Indicate which of the following material does not retain magnetism permanently. A. Soft iron B. Stainless steel C. Hardened steel D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
48. The magnetomotive force is A. the voltage across the two ends of exciting coil B. the flow of an electric current C. the sum of all currents embraced by one line of magnetic field D. the passage of magnetic field through an exciting coil Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
49. The relative permeability is less than unity is case of A. ferromagnetic materials B. ferrites C. non-ferrous materials D. diamagnetic materials Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
50. A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be A. Zero B. BLI C. B2LI D. BLI2 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board