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What is the essential effect of a magnetic field?
Answer:
A magnetic field is an imperceptible entity that exists in a region of space that may be void of all matter in the vicinity of a permanent magnet or an electric current. The magnetic field is a vector field an endless set of vectors one at each point in the region of space where the magnetic field exists. The affects of a magnetic field is either a permanent magnet or an electric current. The defining results of a magnetic field is to exert a torque on a magnetic dipole that is in the magnetic field as long as the magnetic dipole isn't parallel or anti-parallel to the magnetic field.
Roche limit: The position about a massive body where the tidal forces because of the gravity of the primary equivalent or exceed the surface gravity of a particular satellite.
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Number of neutron in C 12 is (1)6 (2)7 (3)8 (4)9 Ans: (1)6
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