51. A 300 mm long conductor is carrying a current of 10 A and is situated at right angles to a magnetic field having a flux density of 0.8 T ; the force on the conductor will be A. 240 N B. 24 N C. 2.4 N D. 0.24 N 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
52. A material which is slightly repelled by a magnetic field is known as A. ferromagnetic material B. diamagnetic material C. paramagnetic material D. conducting material 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
53. The change of cross-sectional area of conductor in magnetic field will affect A. reluctance of conductor B. resistance of conductor C. (A) and (B) both in the same way 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
54. The direction of magnetic lines of force is A. from south pole to north pole B. from north pole to south pole C. from one end of the magnet to another D. none of the above 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
55. Reciprocal of permeability is A. reluctivity B. susceptibility C. permittivity D. conductance 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
56. Susceptibility is positive for A. non-magnetic substances B. diamagnetic substances C. ferromagnetic substances 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
57. Which of the following materials are diamagnetic? A. Silver B. Copper C. Silver and copper D. Iron 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
58. Magnetising steel is normals difficult because A. it corrodes easily B. it has high permeability C. it has high specific gravity D. it has low permeability 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
59. For which of the following materials the saturation value is the highest? A. Ferromagnetic materials B. Paramagnetic materials C. Diamagnetic materials D. Ferrites 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
60. Magnetic moment is a A. pole strength B. universal constant C. scalar quantity D. vector quantity 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
