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JEE PHYSICS MCQ: MAGNETIC EFFECT OF CURRENT
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Two similar moments and each magnetic moment are taken. If is cut alor its axial line and is cut along its equator line all the four pieces obtained have each of
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Correct option: C
magnetic moment
Option C (magnetic moment ) is correct because cutting the magnets along either the axial or equatorial line halves the magnetic moment.
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Reason: Velocity of charge particle is not changing in magnetic field. Pick out the wrong statement : A steady current is flowing in a circular coil of radius , made up of a thin conducting wire. The magnetic field at the center of the loop is . Now, a circular loop of radius is made from the same wire without changing its length, by unfolding and refolding the loop, and the same current is passed through it. If new magnetic field at the center of the coil is , then the ratio is Lorentz force can be calculated by using the formula Two particles and having equal charges, after being accelerated through the same potential difference, enter a region of uniform magnetic field and describe circular path of radius and respectively. The ratio of mass of to that of is :