61. How does the magnetic compass needle behave in a magnetic field?
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?
63. One telsa is equal to
64. The susceptibility of paramagnetic materials generally lies between
65. The materials are a bit inferior conductors of magnetic flux than air.
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