EASY
NEET
IMPORTANT
Earn 100
Assertion : If a charged particle is moving in perpendicular uniform magnetic field, its kinetic energy does not change
Reason : Velocity of charge particle is not changing in magnetic field.
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Important Questions on Magnetic Effect of Current
EASY
NEET
IMPORTANT
Assertion : Unlike charges are projected in opposite direction in transverse magnetic field, then they are deflected mutually opposite directions.
Reason : If velocity of two charge particles are in opposite direction in transverse magnetic field then force will be opposite direction.
EASY
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IMPORTANT
Assertion : A current element is a source of magnetic field.
Reason : A moving charge is a source of magnetic field.
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IMPORTANT
Assertion : The trajectory of neutron when it is projected perpendicular to an electric field is parabola.
Reason : A moving charge entering parallel to the magnetic field lines moves in a circular path.
HARD
NEET
IMPORTANT
Assertion : Various regular polygons formed by a constant length current carrying wire, then magnetic induction at their centres are increases when their number of sides increases.
Reason : A magnetic dipole placed in non uniform magnetic field, then torque acting on it is always zero.
EASY
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IMPORTANT
Assertion : A planar circular loop of area A and current I is equivalent to magnetic dipole of dipole moment M = IA.
Reason : At large distances, magnetic field of circular loop and magnetic dipole is same.
EASY
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IMPORTANT
Assertion : Magnetic force between two charges is generally much smaller than the electric force between them.
Reason : Speeds of charges are much smaller than the free-space speed of light.
EASY
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IMPORTANT
Assertion : As a direct current passes through a thick metallic conductor, it produces magnetic field only outside the rod.
Reason : Current passes only along the surface of the conductor and not through the interior.
EASY
NEET
IMPORTANT
Assertion : For Amperes law , also includes the contribution from current not enclosed by the loop.
Reason : A moving charge produces magnetic field but no electric field.
