61. How does the magnetic compass needle behave in a magnetic field? A. It assures a position right angle to magnetic field B. It starts rotating C. It assures a position which follows a line of magnetic flux 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
62. A certain amount of current flows through a ring shaped coil with fixed number of turns. How does the magnetic induction B varies inside the coil if an iron core is threaded into coil without dimensional change of coil? A. Decreases B. Increases C. Remains same D. First increases and then decreases depending on the depth of iron in¬sertion 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
63. One telsa is equal to A. 1 Wb/mm2 B. 1 Wb/m C. 1 Wb/m2 D. 1 mWb/m2 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
64. The susceptibility of paramagnetic materials generally lies between A. 10-3 and 10-5 B. 10-3 and 10-7 C. 10-4 and 10-8 D. 10-2 and 10-5 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
65. The materials are a bit inferior conductors of magnetic flux than air. A. ferromagnetic B. paramagnetic C. diamagnetic D. dielectric 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
66. The use of permanent magnets is. not made in A. magnetoes B. energy meters C. transformers D. loud-speakers 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
67. Degaussing is the process of A. removal of magnetic impurities B. removing gases from the materials C. remagnetising metallic parts D. demagnetising metallic parts 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
68. Air gap has_______eluctance as compared to iron or steel path A. little B. lower C. higher D. zero 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
69. Which of the following is a ferromagnetic material? A. Tungsten B. Aluminium C. Copper D. Nickel 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
70. The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is A. proportional to 7 B. proportional to X C. proportional to distance between the conductors D. inversely proportional to I 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